Kostas
Dormant Watcher
The Nomads are with Adanos ,if you'll play for Beliar you'll have to kill them.
I think you can still kill an NPC and complete the quest even though you befriended him.
About health:
It really depends on the health you got now,if you have enough LPs to increase your health by 50% or 100% you'll see the difference immediately,imagine that an ogre needs now 2-3 hits to kill you but after he'll need at least 6 and you could take a couple of them at the same time without being afraid to die.
I think you can still kill an NPC and complete the quest even though you befriended him.
About health:
It really depends on the health you got now,if you have enough LPs to increase your health by 50% or 100% you'll see the difference immediately,imagine that an ogre needs now 2-3 hits to kill you but after he'll need at least 6 and you could take a couple of them at the same time without being afraid to die.