A magical FTM (Female to Male) or MTM (Male to Male) or something else to male demon transformation! 

You are a human thief that's a member of the Hero's party. You travel with 3 other party members; 

Nikon the male elf swordsman confidant, charismatic caring for the whole party even if he sucks at first aid. 

Malhad the male mage and healer, despite being a stoic wood plank and having to fill both roles he's good at both spell casting and supporting. 

Finally Gildra the female dwarfen vanguard using an axe and shield as her main weapons, shortest of the 4 of you but she could probably bench press the whole group with a singular arm if she felt like it.

But during an expedition through a dungeon for loot you came across a scythe which would probably fetch a pretty penny...