Yeah, Choi Han knows that Cale from Korea starts from Chapter 400+, and after that Alberu also finds out about it in Chapter 500 + ...ლ(´ڡ`ლ)
Of course his personality get more soften up as time goes by.. but yeaahh ╮( ̄▽ ̄)╭ that tsundere side of his always make him think he was a bad guy lol, even though he had save many people...
Haahh that poor human, hope he get his slacker life after everything get resolved ( ̄∇ ̄") (sorry for bad grammar)
My opinion is that cale has never been 'hard'. It's just that he's fooling himself to believe that he is, but in actuality he adopts these bunch of children and a bunch of friends, who all love and respect him, and tries to prevent the end of this world.
*Slight spoiler*
The only reason he is a bit standoffish is because of what happened to him in Korea. And honestly, when they reveal what happened, and how choi Han at least finds out, that entire story line is so well done.
**
The story did drag a bit in the middle, but do carry on, the pay off is absolutely worth it!
*BIG BIG SPOILER*
LIKE SERIOUSLY CH 600ish spoiler. So read at your own discretion.
So there's an entire arc where Cale gets to go back to Korea for some time. And some (you can guess who) characters also get to go with him. They get to see what life was like, Cale gets to meet some of his old teammates. There's some time travelish elements so I won't spoil any more, but honestly this was my favourite bit. I like how Cale makes peace with that world. He's a bit OP, so seeing character moments like that are really nice.
If anyone wants to read the novel now's the perfect time! It's almost ending so you can start binge reading! And honestly, I don't know how you guys can be so patient and wait lol.
So enjoy the art here, and focus on the plot in the lightnovel! Have fun ε=ε=(ノ≧∇≦)ノ