He lived among IMMORTAL Sunfolk most of the time - and those are anything but moody! He had Savah - possible mentor and stabilizing element - he had Mender as agemate and "co-magicuser" (okay - maybe not only positive influence here ).
- moody? - for sure!
- disappointed? - maybe
- feeling misplaced? - maybe
- mistrusting? - check!
- unused of having company? - check!
- kicking for wake-up call? - bad manners :x
Tho I'll say it again - blaming less the characters than the artists - either for bad characterisation or not comprehensible storytelling. Waiting for further issue(s) before judging about his character ...