TV-Series
Description
Mei Irizaki is a student aboard the Harekaze and serves as the ship's torpedo chief, also known as the water mine officer. She is a student at Yokosuka Girls' Marine High School and a member of the ship's bridge crew. Her background includes being born on January 28 at an offshore lithium refining plant in Kawasaki, Kanagawa Prefecture, and she has AB blood type.

In terms of appearance, Mei is a petite girl with a height of 146 centimeters. She has brown hair and brown eyes, and typically wears her hair in a broad ponytail held by a red ribbon, with a green hair clip on her left side. Her most distinctive feature is her casual attire; she almost always wears an orange hoodie with a cat face design and a cat-ear ribbon over her standard school uniform, even while sleeping.

Mei possesses an energetic, lively, and highly competitive personality. She is famously impatient and has a tendency to act before thinking, preferring quick results and immediate action. Her impatience is reflected in her favorite quotation, which is a ruthless saying attributed to the warlord Oda Nobunaga: If the cuckoo doesn't sing, kill it. She is known for her love of firing torpedoes and depth charges, finding the thrill of battle to her liking, and nothing makes her happier than the chance to launch a full salvo. This has led to her being described as trigger-happy and eager to jump into a fight. However, while she enjoys firing upon enemies, she does not like being fired upon and shows signs of fear when under attack or when shells explode unexpectedly. Despite her tough and sometimes grumpy exterior, she is one of the more cheerful and optimistic members of the bridge crew and is deeply devoted to her friends.

Her primary role in the story is as the Torpedo Chief on the Harekaze, responsible for operating the ship's torpedo systems. She takes her duties seriously and is a capable officer, holding a middle-class seafarer's license. Beyond her combat role, she has several notable abilities and interests that provide a contrast to her impulsive nature. She is skilled at shogi, or Japanese chess, holding a first-grade amateur rank, and she enjoys studying game records as a daily ritual. She also has an interest in woodworking. At school, her favorite subject is Japanese history, and she strongly dislikes physical education classes, despite her high energy levels. Her favorite food is eel rice bowl, while she dislikes cold soba noodles.

Mei shares her most significant relationship with the gunnery chief, Shima Tateishi, to whom she is a close friend and constant companion. They operate as a seamless team in combat, and their partnership is a formidable one. This loyalty is demonstrated when she accompanies Shima even when Shima is confined for questioning after being affected by the RATt virus, showing that her devotion to her friend overrides other concerns. She also interacts regularly with other bridge crew members such as Captain Akeno Misaki, Vice-Captain Mashiro Munetani, and navigator Rin Shiretoko, though her impatience can sometimes cause her to act unreasonably, such as shouting at Shiretoko for no apparent reason.

Throughout the course of the story, Mei experiences subtle development. While she is initially known for her impulsiveness and trigger-happy attitude, she demonstrates the ability to become more composed and show leadership when the situation demands it, such as during critical moments in battle when she must calmly direct the firing of torpedoes. Her character arc reinforces that beneath her impatient and battle-loving exterior lies a competent and loyal officer who grows to better channel her aggressive energy for the good of her crew.