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.

Spoiler

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.