So... three characters from an X-Men RPG called X-Men United I'm in. It's run on Elftown, so you need to be logged in to see that page.
The girl on the left is Lyra (played by Ravenclaw), middle one is William (my character) and the right one is Jayn (played by Furvan).
Lyra can change her colour, morph into her surroundings by blending into them, acquire the strength of the object she blends with and has supernaturally accurate senses. William absorbs electric and electromagnetic energy to create 'energy extensions' from his body. He can also create energy spheres, but it takes much more energy compared to the extensions. Jayn can control fire and teleport.
Just for your information, they're siblings, 15, 19 and 17 years old respectively and their family name is Elcan Relman (don't ask).
Enjoy the not-very-good background!