re: deltarune, undertale
Just wanted to tack one more thing on this. We know your (the player's) SOUL is in Kris. We strongly suspect Kris is soulless because of certain mannerisms, and the ending mirroring the soulless endings of Undertale. Also this, which states that their body "contains a human SOUL (yours)"
Again parallels here to UNDERTALE's end, where the only way to recover the world from the ERASE/DO NOT ending is to sell your soul to the First Human.
re: deltarune
I'm specifically noting hearts here, because Ralsei claims to be a prince, and wears heart iconography. His whole story of "I've lived here my entire life waiting for you" is shaky at best, and actually contradicts his own legend that "Three heroes appear at the world's end"
Also, I don't even think he's a Darkner:
deltarune
So, I think Ralsei's persona is probably fake? In every other card suit, the creatures look the same. Lancer looks a lot like his dad, the King. The low and high tier diamond/heart enemies look alike, as do their respective kings (see image).
Ralsei does not - you can specifically see the King of Hearts here, who looks totally in line with the hearts archetype. Which is not Ralsei.
I can't go to hell - I'm all out of vacation days.
Birds are good. Computers are bad. I'm too old for this.