I love the idea of a scorpion character but instead of fire I have 2 suggestions:
Name: "Fear" the Stinger
a) Life element, perhaps a white colour with a shiny silvery stinger.
Special skill - Venom Regen - does life drain from an acid sting.
b) Earth element, dark green or brown colour with a bright coloured blue/green/orange stinger.
Special skill: acid sting - does venom damage to opponent over time.
I think the life character fits with being a tank as it could have high armour stats due to its exoskeleton and long durability due to life drain. The earth element is just a secondary suggestion lol.
RE: Common Monster Suggestions- I'm looking for input from you