Garou/Relationships

Bang
His former teacher Bang taught Garou everything he knows about fighting. After Garou went on a rampage and attacked his fellow students Bang kicked him out of his dojo. After he heard Garou started hero hunting Bang recruited his brother and went out to stop Garou. 'The following section contains Webcomic spoilers. You have been warned manga-only readers.'

Saitama
Garou displays hatred toward Saitama during their fight, seeing Saitama as the collective unfairness of the world, add that Saitama is a hero, Saitama represented everything that Garou hated and was fighting against. Saitama is responsible for defeating Garou both physically and mentally, realizing that Garou wanted to be a hero instead of a villain.

Saitama showed mercy towards Garou, refusing to kill him and acknowledging his flaws.