We haven't exactly seen bada die, but he did say he was killed after Doha was killed by the murderer back in the earlier chapters.
So basically we're just running on the thought of he did die, but it's not entirely confirmed since bada said it and it wasn't shown.
Correction, I got the names wrong btw.
As per og bada's memories, we only know that he's died multiple times AS AN NPC. But now that he is an awakened player, we haven't seen him die ourselves. and neither has Bada if i remember.
Have we ever seen Doha die?
If so, can you refer to an exact chapter?
I don't remember ever seeing him die, you know?
Maybe I'm mistaken?