Name: Karkat Vantas
Age: 16 years old
Universe: Homestuck
Appearance: 
[img=http://img1.wikia.nocookie.net/__cb20110602215321/mspaintadventures/images/e/eb/03353.gif]
Powers: Nothing Supernatual, but Karkat is much more durable and significatly stronger than a human, even at only 13 years old. Karkat has been shown to be empathic however, first noticed in his obsession with romance (which is much more complex for his species), and later at his ease in managing the emotions of his surviving companions in the game. That being said, although Karkat understands the emotions of others, he is less in control of his own, often masking them in fits of anger and explosive rage, though these facades are broken when Karkat feels like a friend of his is in need, or when he is put under extreme stress or terror. Although he is abrasive at first, once someone gets to know him, he is a caring and devoted friend, though still kind of a jerk. 
Weaknesses: Karkat is durable and strong, but not immortal. He is weak to anything a typical human would be. He's also a bit socially akward, and becomes flustered around romantic situations (as a troll, Karkat is pansexual, and does not differentiate his relationships by gender, and also feels romance based on hate, known as Kismesissitude), he is also quick to become panicked when in life threatening danger, though he will often mask this and try to fight anyways.
Brief Bio: Karkat is a troll, an alien species from the planet Alternia. A mutant blooded troll, he has bright red blood like a human, which makes him a social pariah on his planet and a potential target for killing by the imperial government. He partook with 12 other trolls in a game that lead to the creation of another universe. 
Other: n/a

Name: Terezi Pyrope
Age: 16 years old
Universe: Homestuck
Appearance:
[img=http://mspabooru.com//images/15/5a7b779c78842df9486ce749ccea91b8.png]
Powers: Terezi has no particuar supernatural powers, however, she is significantly more durable than a human, and much much stronger, far exceeding even the strongest and toughest humans. She is also well versed in psychology, able to make educated guesses at the actions and thoughts of her targets, making her an expert detective and a dangerous opponent to fight. In addition, she is capable of seeing without use of her eyes, though smelling and tasting her environment, much like an insect. 
Weaknesses: While Terezi loves to fight, she has her limits. She is particularly hurt by constant criticism of her failures, and has been shown to have problems with drugs in the past. Other than that, she has the same weaknesses as any human, but is able to take much much more damage than any human would. 
Brief Bio: Terezi was one of the Alternian Trolls that partook in the game. She is a teal blood, and as such is a member of the upper middle class. She also is a student of law, although her view of law and justice is much more brutal and penile than what any human would see, often executing her toys for the fun of it.
Other: Was romantically involved with Karkat for a brief time, though they try not to discuss it