#Basically an 'I am Kris' absolute least favorite person ever' kind of self insert

[kakusu-shipping]

OMG YOUR DELTARUNE S/I LOOKS SOOOOO COOOL TELL ME ABOUT THEM!!!

Thankyou thankyou!!! They're the Vessel from the beginning of the Survey Program, and follow Kris around as a ghost narrating. Sort of the Chara to their Frisk, but with a lot more backseating

They don't control Kris, per say, like the player in canon Deltarune, but they do have more than just the power of being really annoying and can sway Kris without their input. Obviously, Kris isn't a big fan of being told what to do against their will and tends to fight back as much as they can.

They try not to be too annoying to Kris and stay in their lane as just an observer, but sometimes a choice comes up that they get entirely too excited about (like giving the plush to Berdly in Chapter 2, or giving affection to Ralsei) and end up accidentally forcing Kris to go along with them. They rarely notice when they do this, and Kris is unable to convey their lack of control to them, making their relationship very uneven.

In the Light World no one but Kris can see them, and they can't go very far from Kris on their own, where in the Dark World they can move at will and can even physically interact and be seen by everyone else, though Kris is still the only one who can hear them, so they tend to still stick pretty close to them.

They can also possess Kris to fully influence their choices and speech, though they only did so once and it was on complete accident. Kris described the experience as taking a Back Seat to their own life, fully conscious but unable to do anything. They've sense sworn to Kris to never do this again, it's the one thing Kris trusts them on.

I haven't yet decided if they're something that's always been with Kris, or if they're a new thing that appeared around the start of Chapter 1. That's probably a decision that'll change as we get more chapters and more information on Kris themselves

This Self Insert doesn't have any self ships attached to it, per say. The Vessel is very attached to Berdly and Ralsei but in a much more "Kris you should date these people" way, which makes Kris incredibly uncomfortable so they try to keep to themselves about it.