As one of the most weird and annoying NPCs in Skyrim, I just wondered if anyone had creative ways to kill him. :)
Marry Mjoll, then when he is sleeping, wabbajack Aerin into a sweet roll and give him to one of your kids.
I would take him to the homestead near Pinewatch then use the Shout Unrelenting Force to throw him off the cliff to the Necromancer. Or turn him into a chicken with the Wabbajack...I bet Mjoll would like a pet, anyway. Or, to continue with the theme of Daedra Worship and Conjuring Magic, give him a bunch of cheese. Remember that the cheese is to die for, just as Sheogorath said.
Use telekinesis on a beartrap and shoot it at his face. :D
Lock him in a room with Nazeem and Grelod the kind, Hit them with frenzy and then watch the show.
I had Mjoll wait outside in Riften as I soul trapped and killed Aerin while he slept in his house.
I stole all his stuff including the POS butter knife he carried around.
I then turned him into a zombie so I could hit him with Dawnbreaker and turn him into a pile of ash in front of his chair. It now looks like he was sitting there and underwent spontaneous Imperial combustion, which is totally a thing.
I then took his butter knife and enchanted it with his soul into a soul trap dagger called "Aerin the Little Prick" - because the knife is little and could prick you.....
Finally I gave all of his belongings to Mjoll who said, "I'm itching for a fight.". So we took out a couple dragons and a few giants before callapsing into bed for a little "Lover's Comfort."
When Mjoll's not in bed, she keeps "Aerin" strapped to her inner thigh, where he's close, but oh, so far away. On the plus side, she never seems to get upset about Riften anymore.
I tried to make him die without killing him myself as Mjoll wouldint like that and my cheracter wasint a murderer. Marry Mjoll and buy lakeview (the Falkreath homestead) then when Aerin goes outside FusRoDah him right over to the Necromancers alter. He will not flee but immediately try and gut the necromacer (the heroic perv) with his butterkinfe. He will unavoidably fail and get turned into a sacrifice to whatever daedra that dude worships. Then go tell mjoll that he died a heros death. I roleplayed retriving his body and killing the conjurer just to make her feel better. And that, my friends is how you lawfully get rid of that jelous, annoying, perverted little drip. :)
P.S. I might as well be that necromancer for reviving this thread.
I made Mjoll join the blades. Right after the oath, I cast a Fury spell on the creep. I loved watching Mjoll killing him herself. We were insade the temple, therefore I deadthralled him and made him follow me outside to the cliff. One of the most satisfying Fus Ro Dah ever. The best thing about it is that Mjoll is so happy to be a blade that she doesn't seem to care about the wole thing.
Use Soul Trap & go UNLIMITED POWER!!!! then use the Black Book ability to summon your personal servant & give him it... This way you've turned his body to ash so no potential zombie Aerin, his soul is with a Daedra for all eternity & you get to unleash your Inner Sith Lord :D Suppose the only improvement to this would be to kill him with Mjoll before reviving him as a thrall beforehand :/