Wait, did the ant enter in the eye and kill it from inside ? And here I was thinking he could just kill him by entering his mouth... (°-°)
@Singul4r I don't think he would ever abandon his family, so he couldn't become a "true" antagonist. Possibly a protagonist that fight against the world but not an antagonist.
@DoubleBeef if you had paid attention to the story so far yo couldve realized that on your own. i mean compare him now to when he was a rank-e hunter. you can see how much his character has developed and changed.
As an LN reader, I can confirm that what they said is not a spoiler, but saying that it isn't a spoiler makes it a spoiler therefore I will mark this post as a spoiler.
Note: This is (kind of?) a spoiler, that is if you read what @Singul4r said, but take it as you will