Her rigging at base form consists of her funnel to her back, a 12.7 cm twin gun mount slung to the side, and two 61 cm quad torpedo tubes on thigh straps.
She has a carefree, pugnacious yet unsure and worrisome personality. Her catchphrase is "-poi" (-ぽい), meaning "maybe?". Her "dogness" upon remodel seems to have inspired personifications of the destroyer in other franchises. The Yuudachi in Warship Girls R has fake dog ears and a doge-like expression, while the Yuudachi in Azur Lane is a dog girl outright along with the rest of the Shiratsuyu-class.
Her remodel's change in appearance and personality alludes to her alleged performance in the Naval Battle of Guadalcanal and her nickname, "Nightmare of Solomon". Her artist tweeted that her hair flaps were to reflect her "ferocious hound"-like history during her final battle. While the historical Yuudachi was indeed present during the battle, the name "Nightmare of Solomon" was the name US Marines stationed on Guadalcanal christened a night bombardment - a night bombardment that Yuudachi did not participate in.
