Sonic also respects Saitama for fighting monsters and even promised to himself to never fight Saitama while the hero is fighting monsters. It is unclear as to how far this side of him goes to, as he was willing to warn Genos of the Deep Sea King, yet fought him when Genos interfered with his battle with Saitama.Дue to constantly losing to Saitama, Sonic is shown willing to do anything, even trading his own humanity, to defeat him by becoming a monster through the consumption of a Monster Cell provided by Gale Wind and Hellfire Flame, although he feels that becoming a monster is equal to death, as he will be no longer human. When Sonic leaves to search for Saitama, he gives his words of wisdom to Frank, saying that if he is too confident in his fighting style and loses, the result will always be the same. While he is pacing himself, Speed-o-Sound finds and befriends a little piglet as well, naming it Ino, thus showing his more noble side. During this period, he spent a great deal of time with Frank, a hunter who had almost been killed by a bear and confides with him his inner turmoil. As shown when meeting Genos for the first time, he tells him that heroes can neither win against a truly strong opponent nor can they truly protect anything.Дespite the way he presents himself, Sonic has a soft side, something seen when training to fight against Saitama. To that end, he holds considerable disdain for the world, being quite cynical, especially towards heroes. Sonic has no regards for human life other than his own, and even takes pride in the fact that he has never let an opponent live. Sonic has a large ego, and when he sets his mind to killing someone, he refuses to give up until he succeeds, unwilling to tolerate the existence of someone more capable who has directly beaten him. Sonic excited to test his skills on Saitama Despite his normally calm demeanor, Sonic loves fighting, motivated by bloodlust against weak opponents, motivated by the thrill of battle and his superiority against strong opponents he can beat, and motivated by competition against a strong opponent he can't beat.

Tvtropes sonic heroes