Deltarune -

The main antagonist who creates the Dark Fountains. Who is the Knight? Is it the mysterious figure seen at the end of Chapter 2? Is it a new character? The most popular (and terrifying) theory is that it is Kris themselves. When they rip out the soul at night, are they going to create the next Fountain?

Ralsei is a walking mystery. He looks exactly like Asriel (Kris's absent brother), but wears black robes. He is excessively kind, teaches the player to pacify enemies, and knows the prophecy intimately. Suspiciously, Ralsei is the only Darkner who does not turn to stone when entering a different Dark World (Lancer does). He also seems to break the fourth wall, understanding "Save" files. Fan theories suggest Ralsei is either a manifestation of Kris's grief or the true secret final boss. The "Weird Route": Deltarune’s True Villainy Undertale had the Genocide Route. Deltarune has the Weird Route (aka the SnowGrave route). It is not simply "kill everyone"; it is psychological torture. Deltarune

The apocalypse. If too many Fountains are opened, the balance breaks. The Titan's rise. The sky turns to "Roaring." Darkners turn into mindless beasts. Ralsei is terrified of this, which makes his suspicious eagerness to keep the party small and contained feel less like kindness and more like control. The main antagonist who creates the Dark Fountains