Frisk (Undertale) & Harry Potter FanFiction

His Light, Her Darkness

His Light, Her Darkness

F/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Harry Potter, Frisk (Undertale), Sans (Undertale), Frisk's Parents (Undertale), Frisk (Undertale) & Harry Potter, Frisk (Undertale)/Harry Potter
Tags
Author Is Sleep Deprived The Author Regrets Nothing Harry Potter Needs a Hug Harry Needs a Hug Female Frisk (Undertale) Author doesn't know how how to tag Harry is a little psychopathic Corrupted Souls (Undertale) The Author is bad at Summaries No Beta we die like our prefered Genders Frisk (Undertale) Needs a Hug Sans (Undertale) wants alcohol
Harry was always a little dark, but someone had always helped keep him on an even keel.Frisk never wanted to leave her darker half, but something compelled her to jump down that hole at Mt. Ebott.Sans just wanted the kid to be okay at the end of this...
Where the Lost Become Found

Where the Lost Become Found

Gen
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Harry Potter, Tom Riddle | Voldemort, Chara (Undertale), Frisk (Undertale), Original Undertale Character(s), Sans (Undertale), Papyrus (Undertale), Toriel (Undertale), Flowey (Undertale), Harry Potter & Sans (Undertale), Frisk (Undertale) & Harry Potter, Harry Potter & Toriel (Undertale)
Tags
Family Fluff Past Child Abuse Tooth-Rotting Fluff Child Abandonment Protective Harry Potter Harry Potter is a Horcrux Harry Needs a Hug Harry Potter-centric Adopted Harry Potter Horcrux Tom Riddle and he gets one Toriel Adopts Harry
Harry is abandoned on Mt. Ebott by his aunt. Toriel left her husband after their two children died. Alone, they are broken and lost souls. Together, they are a family. (A Toriel raises Harry fanfic.)