Drelas can follow the player outside and can get caught up in a fight with the dragon found near this location.
Drelas can represent a difficult opponent for low-level players, so caution is advised.
When entering his cottage during daytime, he will likely be hunched over the Arcane Enchanter in the corner, with his back to the door. With a high enough Sneak skill or potion, it may be possible to perform an initial sneak attack.
Drelas will often retreat upstairs and attempt to heal himself, so a good strategy is to use a Magicka Poison during the initial attack.
Once killed, Drelas does not respawn.
If the Harmony spell is used on him (he is too powerful for low-level Calm spells), he will speak trespassing NPC lines such as, "You're not supposed to be in here."
Although he is a Dunmer, he uses the same voice as many male Altmer.