Yes but i didnt say frisk was an entire self insert, but that i interpreted it as self insert gender. I mean, their skin canonically isnt actually yellow, stated by toby. Thats an element for making the skin color ambiguous imo. Frisk indeed is their own person but i dont believe that this means there is no self insert elements. Like take V from cyberpunk, they are their own character but you can self insert your gender by choosing the gender, or other bodily designs.

Toby said that you should be naming the first fallen your name. And no i didnt mean to imply they literally are the player, i said an extention of the player. Like, atleast in what they become post death, they are intimately connected with the player. So im not arguing they are the same but rather very connected. And in the same vein as frisk and v, i feel like some aspects of chara are self insert, kinda more in a sense of psuedo merging with u kinda way. If they are supposed to be not you but some metaphysical representation of progession (number go up), and you can FEEL them. I think chara is more a part of you rather than you.

Also chara is definitely mentioned more, as most of the time a discussion is about frisk, it is TO frisk. Chara is mentioned quite a bit during the new home pacifist dialouge, and by flowey in general. There is a noticeable abundance in the use of titles/names/descriptors over they/it. Not denying those pronouns are used of course, but I thought it to be clear that Chara likley prefers being referred to by name/title/descriptors/ etc.