All of the Kongou-class wear a modified miko uniform with differently colored skirts and thigh boots. They also wear the same signature winged hairband.
For her second remodel/kai ni, she gains the same modifications as Kongou, replacing her spider rig with a ship-like rig, except that the hairband is turned into hairclips (and have a different design) and she has a shorter haircut.
For the 7th anniversary of the game, she was given a Kai Ni C remodel like Kongou's with all the updates and modifications that implies. Her hair also grew somewhat longer than her base form and her hairclips appear to be connected to each other.
Personality
Tends to be depicted as a fiery airhead girl who usually can be seen worshipping her big sister. This leads to her frequently being portrayed as a lesbian, siscon, and at odds with the admiral, either being indifferent to his presence or being a deep, perhaps one sided rival with him due to her sister's unrelenting admiral love.
Her "Hiei Curry" featured in her hourlies, whether it is good (but very spicy) or just bad food (usually portrayed to be the latter), is considered to be infamous for making the admiral run away for several hours. Oftentimes, her cooking is censored food, depicted as a colorful (sometimes purple) pixelated mess. Has a tendency to yell out "Hieee-!" (written "ひえー！" or with a typographical variant), which sounds like her own name.
History
Hiei's aggressive nature comes from her historical record, though it is ironic (and historically incorrect) that Hiei worships Kongou, because the historical Hiei sortied more often with Kirishima, and worked as a team with Kirishima often.
With Kirishima, Hiei initiated the First Naval Battle of Guadalcanal by firing at Atlanta. In the ensuing chaos, Atlanta was damaged along with Helena, twodestroyers, San Francisco, and later Kirishima surprised the battleship South Dakota, which had suffered electrical failures and was unable to detect her. Hiei was attacked by several destroyers sent to reinforce San Francisco and had her superstructure mauled by 5 inch shells. Her steering jammed, and she was unable to proceed on. She was later attacked by B-17s and Avenger torpedo bombers, and sank. Kirishima was surprised by Washington while attacking South Dakota and sunk. The two ships sank within 6 hours of each other, on the 14th and 15th of November 1942.
On Reddit, Hiei shares a subreddit with her sisters over at /r/OneTrueKongou.
