Yuudachi wears a black serafuku shared with the first four ship girls of her class. She has straight long blonde hair with a hair ribbon on top and green eyes. She exhibits carefree behavior, fortified by her frequent use of "っぽい" (Poi) which can come off as very casual.
~! Yuudachi get's remodeled half way into the series. Her hair becomes messy, gaining a hair clip on the left side, and her eye-color changes dramatically to red. Her character also changes as she becomes very pugnacious. !~

Set in a world where humanity has lost control of the oceans to the “deep sea fleet,” the only hope to counter this threat are the Kanmusu, a group of girls who possess the spirit of Japanese warships. The story revolves around Fubuki, a destroyer who comes to the Chinjufu base to train with other Kanmusu. Watch as their stories unfold! 
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(Source: Crunchyroll)

The staff at the "Dai-Ni-Kai 'KanColle' Kankanshiki" event in Yokohama in August 2015 announced that the Kantai Collection franchise will get an anime film in 2016. The event screened footage that features the Kan-musume characters Fubuki, Mutsuki, Yuudachi, Akagi and Kaga, Hiryuu Kaini and Souryuu Kaini, the four Kongou sisters (Kaini), Kitakami and Ooi, Choukai Kaini, Yuubari, Mutsu and Nagato, Kako Kaini and Furutaka Kaini, Zuikaku and Shoukaku, Shimakaze, Kuma, and Ouyodo.
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(Source: Anime News Network)