I have 2 (sorta 3?) characters here. This journal is for Magnar, who is the son of Quicksilver (Magneto's kid, so Magnar would be Magneto's grandson) and Crystal, who is an Inhuman, an alienish-type being. He's 17 and headstrong and arrogant (like his father), yet impressionable. He has control over the elements which can make him do fun things like run extra fast with the wind at his back or run up walls or even across water. He also has an alien puppy that can teleport.
The other boy(s) is Sean Madrox, twiceasloud. He's the son of Jamie Madrox (Multiple Man, who I'm sure you remember form Jory's famous portrayal in XC!) and Theresa Cassidy (Siryn). Sean is Sean Cassidy's (the headmaster's) grandson. He has a sonic scream like his mother's, but not as strong. He can also do some emotion manipulation through his voice like she does. He's a fun-loving kid, a bit mischevous. He's 21. When he was 18, he was in an accident and duplicated (like his father is able to). It was a one time thing and the duplicate never went away. So now there's two of him. One of them was renamed Tom Rourke. Tom and Sean don't get along with one another. I realize this is becoming a novel, so you can look at their info for more info!