Next up for the letter "J", for DC comics, we have the character known as Jade. Her real name is Jennifer-Lynn Hayden, and she is the daughter of the golden age Green Lantern(now going by the codename Sentinel). The properties released by her father's ring(Starheart energy) are actually a part of her genetic structure, thus she can replenish this energy on her own without a construct like her father's power ring, and it also allows her to fly. Her twin brother is Todd Rice(otherwise known as Obsidian). She has been a member of both Infinity, Inc. & the Outsiders. She was romantically involved with Kyle Rayner(Green Lantern/Ion), but broke off the relationship. During the Infinate Crisis series, she died trying to stop Alexander Luthor Jr. from attempting to reshape and mold the multiverse in his own image. Her energies were transfered into Kyle rayner, who once again became Ion...but knowing how comic books work, we'll most likely see her again soon!

A: Auron [link]
B: Bizarro [link]
C: Captain Marvel [link]
D: Darkseid [link]
E: Elongated Man [link]
F: Firestorm [link]
G:General Glory+Green Lantern [link]
H: Hellhound [link]
I: Ice and Icicle II [link]