Our Bundle of Joy: Gaster Gang & Kids x Child! Soul Seeker! Reader

Y/n is a 6 yr old, who has the power to see souls, without having to take them out. She's the only child who has this power and can also heal souls, from cracking.

When she falls into the void and meets the Gasters and the Kids, they became good friends.

(Based off the anime 'Happy Sugar Life'.)