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..

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..

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..in the Chaos kissed 7 times and Steven got pregnant,by Akiridion-5's rules,the seventh kiss gives the male a baby..but anyways..

Krell seemed to have fallen for you too..

You guys were all hanging out in One of the big alien rooms..Krel was making inventions,Krell and Aja were both in theyr alien forms,4 amrs,Light Blue skin,Blue eyes ,Light Blue hair and all the clothes..Jim,Claire and Toby were talking with aja and Steve on the Sofas..