Suiko

Suiko is a young woman whose figure is curvy but strongly athletic, with dark eyes, tanned skin, short black hair, and a small beauty mark near the lower-left of her lips. She usually throws a hoodie over a sports top and pairs it with black pants. The webcomic swaps that for a dark, Chinese-style martial uniform trimmed in white, its long sleeves fastened by star-shaped buttons.

Easygoing and carefree, Suiko carries a touch of naivety and a streak of arrogance, now and then rating her own skills too highly, much as Suiryu did before Saitama set him straight. Still, she never shrinks from the work of getting better, and she refuses to look down on others: once Saitama rescues her from Mirror, she thanks him sincerely and even ranks him above her celebrated older brother.

Suiko first appears at the Hero Association's hospital, teasing a sleeping Suiryu awake and reacting with surprise that he now means to become a hero. Her own start comes when Association scouts visit her grandfather's dojo hoping to recruit Suicho for S-Class; she tells them he has passed away and offers herself instead. At headquarters she brushes off questions about Suiryu, insisting she would make the steadier hero, then smashes a training robot in a brief tryout. Placed in A-Class at Rank 40 rather than the S-Class she wanted, she vows all the same to make her mark.

With five Dragon-level threats declared, Suiko is first on the scene when Mirror storms the association's headquarters, opening with a crushing blow from overhead before the fight turns against her and she is thrown into a shop. There she gulps down the strongest liquor on the shelf, the drunkenness unlocking Void Fist at full force; the Void Sky Dragon Fist then flings Mirror onto a passing train, and a kick off a tunnel wall caves in its head, though the machine simply rebuilds itself and dismisses the harm as a sliver of a percent. Chain'n'toad and Butterfly DX show up as backup, but the three are swept aside, and she can only pinch her cheek in disbelief as Saitama wrecks the robot effortlessly.

Afterward she seeks him out to swap technique, introduces him to Suiryu, and declines a spot among the Neo-Heroes, refusing to wear their silly battle suit. As Suicho's heir she is a formidable martial artist who claims to have trained harder than her brother and surpassed him, disciplined enough to earn A-Class in a single showing, yet against a Dragon-level foe like Mirror even her best strikes barely leave a scratch.