User blog comment:FairyRaven/Fairy Tail Chapter 456: Orders, Review and Commentary/@comment-1359322-20151010095330/@comment-1776824-20151010104203

They said she was dying when she was taken over. Seilah gave Kyoka all her energy and then some, on top of extensive injuries. It has nothing to do with personality or loneliness: she was literally just got saved randomly by Mirajane and was unconscious at the time.