Hit. The legendary assasin who is one of the very few people to kill Goku.

"I have never let a job go unfinished."

The assassin from Universe 6 is undoubtedly one tough opponent, and Goku had to pull out all the stops when it came to fighting on even ground. He endured a major toll on his body by transforming into the Super Saiyan Blue Kaio-Ken form, which — while still a treat to witness regardless — still wasn't enough to take out Hit once and for all.Of course, with all the training and fighting experience that Goku has garnered over the course of the series post this battle, a rematch might have a completely different result.