Eri was… a strange abyssal to say the least. From when she was 'born' 6 years ago she had an immense interest in humans, despite the war that was raging on between them and the abyssals. One day, when she had gotten away from a guardian abyssal, she ventured into the coastal area of China. This was a mistake. The Chinese government was barely keeping themselves from collapsing from the abyssal attacks, and captured her. They used her for experiments that were horrific and her screams and cries were heard from the underground lab, but no one came.

When she was about 6 years old, 1 year after her capture, she had an opportunity to escape. The lab's guards were called to the coastal cities to help defend against a major abyssal attack that needed every capable body to assist, and one of the guards forgot to lock her cell. She ran out of her cell, and no one was there to stop her.

Without a captured abyssal to test their weapons on, the Chinese government quickly collapsed due to the damage inflicted by the abyssals. With the help of the Japanese and their shipgirls, the Taiwanese took over the mainland and instilled order as quickly as possible. The search for the escaped abyssal came up with no leads.

A few weeks later, after running through at least 100 miles of water, Eri had found something she could hide in. It was a strange building of some kind. She went under a weird gap said building had. She curled up in a corner of the gap. She was tired of running, so, so tired...and so, she fell off to sleep.

Then some voices woke her up. She slowly opened her eyes, and then froze at the sight. There were dozens of shipgirls, so she was scared. Then… a human walked up and spoke about a 'new addition to the lineup.' To her surprise, a male with armaments similar to a shipgirl walked into view. Something about him called her to him. As the shipgirls started cheering, she walked towards the ship-boy.

This did not go unnoticed. The ship-boy looked up at her first. He asked the first man something, and the man glared down at her, before walking away. Several crowd members began to panic, and some shipgirls aimed their guns at her. However, she got to the ship-boy without being shot at. However, she was still trembling.

Izuku was not expecting to meet an abyssal so soon, let alone a child. "...Hey there… Are you lost?" he asked. He tried to say it in the most friendly way possible He also moved into the path of the shipgirls who were aiming their guns at her as he kneeled before the little abyssal and leaned in a bit.

Eri responded very shakily, "N-n-no…h-h-humans captured me...I-i-i-i escaped a lab...p-p-please d-d-d-don't m-m-m-make me g-g-go back please!"

Izuku's heart couldn't take this. He slowly put a hand behind her head and pushed her into a hug. "It's okay… I won't let them take you back… I'm Izuku Midoriya. Could you tell me your name?"

Eri meekly responded, crying in the hug "E-E-Eri…"

Before this went any further, two people in the audience suddenly stood up. "It's that abyssal that escaped the lab before China's collapse! We demand that our property is returned right now!" one of them screamed.

Everyone there looked at the two men. This included the admirals, the Shipgirls, Izuku, and Hisashi (Who was just returning). They were both Chinese and wearing lab coats.

Izuku growled at them "Eri is not anyone's property. Not while I'm still standing."

One of the admirals laughed. "Oh great, Hisashi! your son is protecting a filthy Abyssal from scientists who rightfully own her! I'm going to teach him his place!"

Hisashi gave the admiral a deadpan look. "You sure you want a mock battle arranged?"

The admiral smirked. "Yes! And If your Son is soo powerful as a macro battleship, he can take on my entire line up, all by himself! The loser has to step down as an admiral!"

Hisashi sighed, rubbing his temples. "Fine." he groaned.

Izuku sighed as he was cradling a crying Eri. "Should I try to not sink them…?" he asked.

Hisashi turned to Izuku. "If possible. His line up is Yamoto, Mushashi, Nelson, Fletcher, Tatusa, and Kaga."

Hisashi turned to the shipgirls. "The mock battle will be held here in 2 hours. Feel free to prepare."

In the stands, Iowa was pouting "we can't back up the new guy! I still can't believe admiral found a way to bring his son back though."

Colorado patted her shoulder. "It's okay. Judging by his armaments, he should be able to put up a fighting chance, Sis… hopefully."

Shimakaze hyperactively giggled. "I think he'll be able to outrun them! He's nuclear powered! You could see the cores on his chest if you look through the camouflage!"

Saratoga was just smiling softly.

Elsewhere in the stands, a certain german battleship looked at Izuku as he left with the abyssal named Eri.

Two hours later, Izuku was idling above the water on his side of the mock battle arena that was the sea theatre.

Hisashi spoke up via intercom. "The rules of the mock battle are simple. Either 'sink' the opposing ships or make them surrender. There is to be no outside interference!"

Izuku sighed as the bell that signaled the beginning of the battle rang. He sped out at top speed, activating his Phalanx and Airframe Missile Systems. He quickly was engaged by Kaga's aircraft, which were shot down almost instantly. One of the aircraft dropped their bomb desperately as it fell down. The bomb landed near him, but the blast did nothing to him. His radar picked up a target moving in quick. He then saw Mushashi steaming towards him.

Mushashi was a tall dark-skinned woman. She had pale-blond hair tied in two twintails with her hair coming down between her eyes. She had red eyes with glasses over them. As for her appearance...on her torso, all she had was a budget sarashi and a black capelet with an imperial seal hanging off its iron collar. This was uncomfortable for Izuku to see. She (thankfully) had a red miniskirt, with black thigh highs with bandages on her legs.

"COME ON NEWBIE, SHOW ME WHAT YOU GOT!" Musashi yelled as she fired her main guns.

Izuku had to dodge several shots. After all, even with his armor, a shot could get lucky. Izuku let out a salvo on his own. Musashi was able to dodge the majority of the shells, but the last two shots hit her directly, causing a massive explosion and sending her flying. When the cameras found her, she was unconscious. There was massive damage to her entire body, especially her arms, as that was where the two shells impacted her. A repair shipgirl was dispatched to retrieve her.

Izuku sighed in relief when he didn't actually sink her. Suddenly, he was hit by two shells from another salvo, Both hit his far-right turret in the exact spot required to penetrate it. This caused the turret to blow up, and izuku lurched to his left due to the sudden weight displacement. After a few seconds, he recovered and groaned. "Damn, down to 4 turrets."

Izuku started moving again. Another wave of planes came upon him. This time several torpedo planes and dive bombers got through, but the torpedo that hit him just scratched the paint, so to say. The bombs just bounced off his hull. He was suddenly met by Fletcher, Tatusa, Nelson, Kaga, and Yamato as the water cleared. "Oh...shit."

His eyes landed on Fletcher. "...You are...Fletcher, correct? I remember making the improved design on your ship version!" Izuku was nerding out in the middle of battle. Even after everything that had happened, he was a ship fanboy through and through!

Fletcher was...a bit confused about why Izuku was muttering about her design, but Yamato cleared her throat. "Apologizes Izuku-san, but Yamato wants to surrender. So does Fletcher-chan, Kaga-chan, Tatsuya-chan, and Nelson-chan. We'd rather not end up as the same as Mushashi. Do you accept our surrender?"

Izuku nodded quickly. "I'd rather avoid unnecessary fighting."

Hisashi smirked from his viewing booth as the match was a victory for Izuku. Eri was in his lap, munching on some candy. He looked over at the other admiral, who was crying. 'And that's what you get for biting off more than you can chew.' he thought as he head patted Eri. He was quickly getting attached to the abyssal. It was weird, as he had hated them for all this time, but this abyssal child got to him. How strange.

In the stands, his four shipgirls were going nuts, shouting and cheering. Most of the other shipgirls were as well. However, our certain german battleship was smiling quietly.

A few days went by, and Hisashi was given a special task by HQ to keep Eri protected, as she could be the key to peace with the abyssals, as far-fetched as it seemed. His shipgirls took to her instantly, treating her as a little sister. while Izuku took the role of an older brother. He treated his shipgirls as if they were his own daughters, so it warmed his heart to see them interact, especially when Izuku nerded out when he met them. After all, he made the designs that ended up being what was used for their armaments.

Then a mission came. It was a scouting mission, and it required a carrier and a carrier escort. Hisashi got onto the intercom. "Could Saratoga and Izuku come to my office for a briefing on a mission?"

Izuku met up with Saratoga midway to the room, and she did a little curtsy. "It is nice to know that you'll have my back, Izuku."

Izuku nodded. "Yea. Hopefully we don't run into abyssals though."

Izuku and Saratoga got to Hisashi's Office, both saluted and Saratoga said "We are here, Admiral Hishasi!" while Izuku said "We are here, Father!"

Hisashi chuckled as he turned to greet them "Just Hishashi when we aren't with the other admirals. The scout mission is for the gulf of Mexico, there has been some sighting of abyssals, but, we need thorough scouting, hence why I sent for you two. Be careful as always."

Izuku and Saratoga nodded and went off to equip their armaments and head out on the deployment to the Gulf of Mexico.

The first few hours of the scouting were uneventful before two shells suddenly racked Saratoga, taking out her entire flight deck and one of her propellers. "Im hit bad! Izuku-kun, we're leaving!"

Izuku immediately started searching for targets, moving in front of saratoga as she started retreating. Then he saw the tracer shells, he aimed where the tracer shells were coming from. And aimed and fired, the tracer shells missed. But he didn't hear any explosion, so his shots must have missed as well, but he needed to get Saratoga back safely!

Then, laughing is heard as an abyssal destroyer suddenly comes up to Izuku's side. "HA! I saw you only have turrets, now I can sink both o-" she was interrupted by a punch directly to the head from izuku, and she slumped forward then into the water. Izuku turned on his smoke generators and escaped with the badly damaged Saratoga.

An abyssal fighter that had observed this turned and returned to a tall, beautiful and buxom abyssal with red eyes and a horn that came out of the middle of her forehead. She had beautiful, long-flowing white hair. She had… clawed hands as well, each claw was black with red lines on the side. She was wearing a sweater that went from her neck to her knees. "...This new addition to their ships...How strange...I should investigate them when I can…" she then left to recover the abyssal destroyer.

When Izuku and Saratoga got back to base, Saratoga was quickly rushed to the dry docks for repairs.

Hisashi sighed as Izuku gave them the after-action report "So an abyssal tried to sneak attack you and saratoga after heavily damaging her. But the scouting was successful at least, due to the hidden bases saratoga's aircraft found. also, today is the start of the Spring Festival Izuku, once Saratoga's repairs are done in a few hours, we'll all head to the gathering spot for it for all admirals and shipgirls."

Izuku nodded and went off to find Eri to tell her of the spring festival, and prepare for it with her.

(A/N If you want to ask me stuff or whatever, here's my discord! Lyruun#9331 Also, before any of you ask why Mushashi was one shotted, her armor at its thickest is 400mm, a 700mm shell would punch right though that if it hits)