Board Thread:Fun and Games/@comment-27524978-20160317154321/@comment-27907368-20160413030013

Chara describes that they were attracted to our human SOUL and determination. Flowey has never had any of the human SOULs within him until we manage to get past ASGORE.

Moreso, in true pacifist we call out to Chara to save them during the Asriel Hyperdeath fight - this is because Asriel is calling out for Chara and she is induced into the human hearts within him.