On one of the runs, undertale and deltarune suddenly merged, and at first it was only the games themselves but soon characters started merging as well, usually the characters throughout the aus merged easily since they were similar enough. However, Kris and frisk were too different to fully merge yet too similar to be left separate so they only partially merged, forming KODT. KODT is a 4th wall breaker and au traveler, though they usually like to hang out in discarded aus or “scrapped tales”, or they are in fileverse, looking at the scripts of all the aus, sometimes they choose to interact but can’t do much to interfere.
I was originally gonna have them be part melted like the amalgamations but decided against it. Despite that, their form is still fluid, usually they look an age between Kris(15) and frisk (9) but sometimes they change forms to the age of whoever is taking charge at the moment.