
Haesol and haesoo got the same type. Also why did yeonwoo ignore the signs? The boy put his arm around him, nothing. Lied about going to the station, nothing. Name Kang haesoo? No questions asked. Come on bro (⊙…⊙ )

From what i know, in korea "Kang" is a very common surname. Majority of the population also have have "kim", "lee", "park", "choi", so it's not unusual for him to not be suspicious, cause the probability that he met many people with the surname Kang before is high. I might be wrong, but many people explained this to me before so i take it as a fair explanation.
I hope jiwoo can mention Dr delein to check his arm, it doesn't have to be Kartein.
I wish he could but if I remember correctly, Arthur lost both his arms. Like they're not there anymore ╥﹏╥
i mean if u think about it... he's a mad scientist so he can basically fuse the veins arthur has left from his upper arm to the prosthetics and perhaps make them durable enough to handle his awakened power
Nah only one