Spam dat flag 1000 times :p This is a gift animation for my beautiful gf @Krattcool33342 It shows the story of Frisk on one of many Genocide routes. As they keep dusting monsters, they find that it's getting harder and harder to distance themselves from Chara. Until they pretty much become the same person...and it's scaring them. The echo in the mirror is a metaphor. Frisk is blaming their genocide on Chara's influence, trying to make it so that they don't feel bad. The more Frisk dusts, the more they see Chara in themselves. The echo in the mirror, a version of the self slowly taking over.
Hope you like it <3