Undertale : Stuck In Another Time

Chara has the scary ability to jump into savefiles and corrupt them by taking over the fallen child and making them do a 'Genocide Run'
When Chara comes across a continuing timeline that has reached the surface but has not yet been reset under the name of 'Frisk', curiosity takes over and they leap into this save file, their only intentions to take over 'Frisk' and make them decieve all of their friends.
What Chara doesn't know, however, is that Frisk is a child full of determination and will go to extreme measures to try and befriend Chara.
Which side will succeed?
Fight or Mercy?

=======×=======