Here's Frisk, Asriel, & Chara.

Frisk
Full Name: Frisk Dreemurr
Age: 13
Height: 4'8
Weight: 101.6
Gender: Female
Likes: Exploring, Butterscotch Pie, Blue, Plants, & Painting
Dislikes: Snail Pie, Resetting, Being called a boy, & Yellow flowers with faces

Asriel
Full Name: Asriel Dreemurr
Age: 13
Height: 4'6
Weight: 100.7
Gender: Male
Likes: Butterscotch Pie, Green, Yellow, Culture, & Dreaming
Dislikes: Yellow Flowers, Snail Pie, Sibling getting in arguments, & Broccolis

Chara
Full Name: Chara Dreemurr
Age: 13
Height: 4'8
Weight: 102.7
Likes: Butterscotch Pie, Yellow, Sports, Summer, & Fizzy Sodas
Dislikes: Snail Pie, School, Pink, Frilly Dresses, & Winter

Fun Facts
1. They all agree that butterscotch pie is better than snail pie.
2. At the beginning, Frisk got misgender by accident by people but now stuck up people are telling her "facts" that she has to be a boy because she wears pants.
3. Asriel is uncomfortable with yellow flowers due to Flowey
4. Chara's favorite sport is soccer.

Frisk©Undertale/Toby Fox
Asriel©Undertale/Toby Fox
Chara©Undertale/Toby Fox