Joker

Joker is a supervillain and a member of the Injustice League.

Personality
The Joker is a dangerous and psychopathic criminal. Although he looks like a clown, he is never to be underestimated. Cruel, sinister, manipulative and above all completely insane, the Joker has proven multiple times to be the Batman's greatest foe. He also claims to have multiple personalities and has a tedency to break the fourth wall.

Physical appearance
The Joker is a tall, slender man, with chalk white skin, ruby red lips and a head of bright green hair falling down in a mop style. His most distinguishing feature, however, is his massive and wide smile that is constantly on his face, giving him a sinister sort of appearance at all times. He is most commonly seen wearing a purple suit with a flower on his lapel, skinny leg pants, a skinny purple tie and a silver chain at his waist.

Early life
, Joker discovered the location of the Cave and attacked Snapper Carr and the Justice League inside.

Present
By October 1, Joker had become a member of the Injustice League. They orchestrated a plan involving controlling plants that attacked different parts of the world, adding his own Joker venom spores to them and taking advantage of his skill in multi-tasking control all the plants in the world wide assault. Eventually, the Team found the headquarters of the Injustice League in Bayou Bartholomew. After most of his teammates had joined the fight and the plant was destroyed, Joker tried taking down Robin. The Boy Wonder managed to evade his knife long enough for the Justice League to arrive, and Batman quickly disarmed the Joker. Faced with the surrender of his teammates, he released the Joker venom from the plants. Doctor Fate (Aqualad) sucked the venom away, and Joker surrendered this time.