Trance aka Hope Abbott is one of the surviving students of Xavier Institute. She was in the Paragon Sqadd mentored by Wolfbane. She can project an energetic astral form which can blast things (reminds me Negative Man). She's not the bravest of the young X-Men.
Ariel is an alien mutant who appeared in the mini Fallen Angel in the late 80's and never appeared again. She can teleport from a door to another (alien ability) and has mental suggestion power (mutant power).