But belt and wire and such seem like suffocation (strangulation) would have been the cause of death then. Looking at remy's list.
Ryven: Scissors, Hook
Mia h: Match (burnt to death?), Crutch, Dumbbell
Mint: Explosives (can't get more severe than blown apart), Dagger
MP: Pistol, axe
Yugi: Arson (see above), Hammer
Remiel: Box cutter, Chainsaw
I think I had more weapons on my list but I can't go back and grab it on the phone.
You could struggle with any blunt weapon. Burning maybe if you had signs of trying to put it put or pull off clothing? But more I'm leaving to some kind of blunt force weapon where the person would probably fight back.