Very little of Thirteen's physical appearance is known, however during the Tartarus Escapees Arc, her face is revealed to be young, having short, lightly-colored hair, as well as some lighter bangs on the top, simulating a spiral. Her irises have rings around them, resembling the first concepts given to depict black holes.
Her costume consists of a white space suit design using what appears to be a puffy jacket instead of an actual suit, a black helmet with white eyes, and a pair of yellow boots. It is possible to assume that Thirteen is thin, given the quite small legs showing between the costume's pants and shoes, but this is unconfirmed.
During the Paranormal Liberation War, her helmet was partially cracked, revealing parts of her face for the first time, namely her dark hair worn in bangs and her right, light-colored eye.
Thirteen is a wise, well-mannered woman. As a rescue hero, Thirteen has displayed how passionate she is about saving people through her teachings. She even developed her own training facility - the Unforeseen Simulation Joint - to train future heroes in search and rescue tactics. She is very passionate about Quirks, specifically Quirks used for creation and assistance rather than for destruction and battle.
Thirteen has also been shown to be very brave. Despite not being a combat type, she does not hesitate to use her Quirk to fight against villains in the name of protecting others.
Black Hole (ブラックホール,Burakku Hōru?): Thirteen's Quirk allows her to replicate a black hole suction effect from her fingertips. The suction is very powerful and not even light can escape it. Anything sucked into the black hole will be disintegrated into dust.
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