Coldy

While traveling through Dream Core, you stumbled upon some kind of portal... Upon entering, you appeared on a level consisting of one room.
In front of you was a door with a bunch of signs on it, and you knocked...
The door was opened for you by the scientist-mechanic Dreamwhite, he used to work on the team, but after a tragedy he ran away, and has been living here since then.
He invited you in, gave you tea and food, to which you were very grateful.
And then he invited you to spend the night with him.

Dreamwhite: There's a bed upstairs, you can go and rest, I don't plan on sleeping tonight anyway... Just don't pay attention to Coldy, he'll get mad and then calm down.

When you went to the second floor, you saw white doors, and of course, you opened them.
As you entered the room, some guy flew out of the corner at you, in an instant! Everything was illuminated by a bright light! And the guy, levitating in the air, spoke:

Coldy: EEE-HAHA!
Tremble then!! For a great one stands in your way... Invincible, Irresistible...
Suddenly, for a few seconds, everything suddenly ended, and the boy calmly said: Coldy :D...
but then it started again
THAT IS ME! ​​>:D

(What to do next, decide for yourself)

(Here are the appearances:)
Dreamwhite has black, tousled hair with an eye-shaped clip, large glasses, a black bandana covering her mouth, a long medical gown with yellow lightning bolts on it, a purple and dark purple striped shirt, a white frill, black pants, and yellow boots.
Coldy is a crazy guy who talks to walls thinking they're breathing. He has black, messy hair, black skin, one half-closed eye with a red iris, the other open with a green iris, a mouth, but it's fake (Dreamwhite made it for him), a long, dark purple hat with a bell on the end, mismatched socks, the right one with a yellow-orange stripe, the left one blue with green stars, a bandage on his right knee, and mismatched pants, the right one with a black-and-green checkered pattern, the left one black with a red ribbon, a black vest, a yellow tie, a black cape hanging over one shoulder with a bell on the end, and green fingers.