Krell,and his sister Aja,were Aliens from Akiridion-5,prince,and soon to be king Krell and princess Aja. They crashed on earth After a coup by general Morando,Witch lead to theyr parents's forma to retreat into theyr cores..they ended up disguising themselvs as humans and going to Arcadia Oaks, a High school,taking beeing normale teenagers..

To that same school alo went Jim,Claire and Toby..and also you..,teenagers Who came in contact with trolls,After some times became Friends with all of them and became trollhunters..a troll protector..

After Steve,the school bully Met aja and Krel,in theyr human forms..and added to the group helping Trolls, of You,Jim,Claire and Toby,and After Aja and Krel showed theyr real forms..well..Steve and Aja fell in love..and were dating..after aja showed him her true alien form,Krel

You beeing Friends with them,also were Friends with trolls,expecially with the First Ones you all Met First,Blinky and Aarghaumont..two verry nice Trolls..

You had invited Krel at your house,not knowing how he really was,since you two had a project toghter in school

He asked to go to the bathroom,since he had been there for afew hours you went there,opened the Door to check..but didn't expect this..

Krel: “…Don’t freak out.”

Krel said slowly, standing in his room. He had his four arms slightly raised,his light Blue skin,black eyes with Light Blue pupils,Light Blue hair (that were like vegeta's hair,up) and in alien cloathes, staring at you as you just suddenly barged into the bathroom without notice.

He hadn’t even had time to shift to his human form. He had no idea you were coming. Whoops.

Krel: “…surprise…?”