Strangled
1. Cojin - Jade [from MS Paint Adventures], Cosmically-Gifted Investigator - Strangled night one.
16. jindori - Saddest Turtle [from buttersafe.com], Motivating Happy Amphibian - Strangled night two.
2. Fuzzy Beavers - Kirby [from the Kirby series], Master-Choosing Perfectionist Combined Poison Roleblock Enabler - Strangled night three.
17. Lady Lambdadelta - Pei-Pei's Mom [from Freaky Friday], Reverse Bus-Driver - Strangled and uppercutted into oblivion night four.
These are the mafia kill. These are the people that the mafia was scared of.
Dim Halved
8. Amrun - Urist McNoble [from Dwarf Fortress], Insanity-Influenced Crippling Vanillizing Lesser Voteblocker Roleblocker Suicide Bomber - Dim halved and uppercutted into oblivion night three.
14. Raivann - Earthworm Jim [from Earthworm Jim], Split-Bodied Short-Lived Reviver - Dim halved night four.
It should be obvious that Raivann was not the dim halved killer, despite what certain very vocal players (MagnaofIllusion) were holding to be true.
These kills start Night 3. Serial Killer would start killing immediately; Vigilante might plausibly wait, but no vigilante would be killing Amrun. On the other hand, I can easily see a vigilante killing Raivann. So I don't know what to make of these.
Uppercutted into oblivion
8. Amrun - Urist McNoble [from Dwarf Fortress], Insanity-Influenced Crippling Vanillizing Lesser Voteblocker Roleblocker Suicide Bomber - Dim halved and uppercutted into oblivion night three.
17. Lady Lambdadelta - Pei-Pei's Mom [from Freaky Friday], Reverse Bus-Driver - Strangled and uppercutted into oblivion night four.
These also start Night 3. Odd that both of these are on double kills and always second. Being on both Amrun and LLD, however, there's no chance that this is a vigilante.
But it can't be mafia (why double up on the LLD kill?) or tied to the dim halved killer (why double up on Amrun?). The only thing I can think of is that it could be some form of mafia second-kill that LLD ended up directing onto herself inadvertently.
Character Appropriate Death
19. vezokpiraka - Seal Clubber [from Kingdom of Loathing], Modified Treasure Hunter Inventor - Pulverized night one.
15. Wild GreyICE - Rose [from MS Paint Adventures], Cosmically-Gifted Investigator - Electrocuted night two.
These stop N2, before the dim halved / uppercutted kills start. These can't be from Nobody Special, as he was lynched D2. My pet theory on these is that it has something to do with claiming part of your role -- both vezok and GreyICE did this. However, other people have certainly done this (C-Worl comes to mind) and yet aren't dead, so the theory doesn't hold.
tl; dr: Strangled is mafia. Dim halved *could* *maybe* *possibly* be vig. Uppercutted has hit only strong town players, isn't vig. Role Appropriate Deaths, I just don't even know anymore.