Fool's Errand-- referance

So after watching Batman Beyond- Return of the Joker on youtube, I decided I wanted to make a character of my own that acted like the Dark Knight Joker.
Remember- I am not claiming the Joker as my own.
I made a new character called Fool's Errand:

Name: Fool's Errand (Fool, or Erin for short)
Age: n/a
Species: wolf
Personality: dark humor, very tricky, cunning, agile, always three steps ahead of his opponent, hated and feared by most of the world
Hobbies: taking a "peaceful" stroll through the mountians, picking on weaker animals, causing panic
Mate: none/looking
Sidekicks: none/kinda looking

I will be using him during any RP's and everything, and he has nothing to do with Serena. They are two seperate characters.

Joker: DC people

Lineart:

Fool's Errand: me