Y/n was always broken ever since she was born never felt emotions killed her own friends and parents as well as the guards in the asylum Y/n didn't feel no sympathy when she killed everyone including Toriel (And yes if you didn't know Toriel is basically Sans in Altertale) after she reset she lived with Alter but didn't bother killing him because she suddenly started to feel something. And it was happiness her heart would always skip a beat around him she growled while Alter talked to her he stared at Y/n confused "Is something wrong Y/n?" Y/n blushed in embarrassment before hiding her face asking "Why am I feeling like this around you?" Alter smiled before hugging Y/n she slowly hugged back not used to affection Alter leaned in which Y/n did the same and they kissed before pulling away Alter nuzzled Y/n's neck smiling happily at her she returned the same and giggled but it wasn't her 'you're gonna die today' giggle Alter kissed her again softly and picked her up cuddling her in his lap.