Although, to be fair, I think most of the heroes on this wiki have their... ruthless side when dealing with certain situations or villains. Good examples of this are Gohan, Spider-Man, Yuji Itadori, and Tanjiro Kamado:
Gohan: sadistically beat and tortured Cell for all the horrible acts he committed.
Spider-Man: In the Back in Black storyline, after Aunt May was fatally shot on the orders of the Kingpin, Peter relentlessly hunted down those responsible for Aunt May's condition, from beating and breaking the bones of criminals, admitting he was prepared to kill the culprit, and of course, the most infamous of all, brutally beating and humiliating Wilson Fisk in front of an entire prison.
Yuji Itadori: After defeating Mahito, Yuji coldly admitted that Mahito was right when he said that he and Mahito are "equals." Then, Yuji vowed to kill Mahito repeatedly, no matter if Mahito changed form or name.
Tanjiro Kamado: acts with great fury when encountering despicable demons.