Oh nooo! Jaina, be careful!! Don't do it, Arthas! (hehe!)
amazing cosplay and photo!
Surely, some part of him was still within LK, but I think it wasn't always able to influence his actions. Actually, it was almost never influencing LK, but it was there, buried deep under layers of cruelty and evil. If you check my other pictures, you'll see one with Jaina and Arthas kissing, which is even more impossible after he turning into a DK, but I agree with you: his love for her never really died, not completely!!