User blog comment:KamariU/WINX SEASON 6 TRAILER!?/@comment-8796478-20130912095812/@comment-19540392-20130914072809

According to a trivia in the Trivia Section of Selina Page, Selina means Moon. Stella's name means stars. Both are illuminating objects. Then, there could be a possibility that they ARE twins. Selina could be a witch from the start and studied at Cloud tower to improve her magic skills.