BangSul — quick recap.

(With due changed to part his story from Tero's in a clearer way.)

> Yi Bang Sul <

> Born in Goryeo, Crown Prince, half Korean half Mongolian.
> Ended up in future Korea during a journey to Yuan.
> Started and ran a whole criminal activity. He met Tero when he arrived to future Earth too, at the hospital when he wanted the other guys about him.
> Tero worked for him in his organisation.
> He headed to Nortrig together with the others, when Haru and KiTae disappeared and PaOh gathered them all for his embarrassing show at the Imperial Palace.
> He and Tero were both entrusted to Yang Yang and met up with the others at school, despite he is a bit older than Tero.
> He was the one dating Prince ChangMi, at the times of the massive mess that involved the prince after the death of LianBi's main consort.
> His future self traveled back in time, from a distopic future with NoriYori, to make sure ChangMi wouldn't die and therefore, LianBi wouldn't leave the throne, resulting in the terrible happenings that followed.
> Present BangSul and future one co-existed in the same time, until present one died.
> While hiding with Gamja in a desolate mountainside village, he met LianBi, in holiday by the Winter Palace.
> LianBi got obsessed by his mysterious ways and did all he could to get him for himself.
> What happens next is well known.

(…)

When LianBi died, as he realises that the Zhou fled to another world, he tried to hunt them down to not let them escape. He got stuck in the past, unable to return to the present, just like the others.
He moved back on Earth and returned to his old business there, until he and Tero met the Nortrig guys again, at the time in which Ri was in Seoul.

Both he and Tero decided to test their luck back in Nortrig again, but in his case, it was mostly because he wanted to see Minho. He often buzzes around him, but never spoke to him nor approached him in a clear way. He realised that it was better that way, than trying to get together again.

He is always blind, with scars all over the top of his face, that he tries to cover with makeup. He can only see through the eyes of the Guardians, when he is merged with them.