One of Dusk (Arknights)'s Ink Spirits. The wiki calls its shape "piscine" (fish-like), but it would be more accurate to call it a pointy triangle with tendrils. Like most Ink Spirits, it is blue-green in its base form and orange in its upgraded form.
A reckless Ink Spirit named by Dusk. Rushes forward single-mindedly and heedless of its surroundings, getting into all kinds of predicaments as a result. Doesn't get along with Stabby (Arknights).