Main Characters:

[For best imaginations, I don't put any random girls pic in here~ Imagine your own face^^]

You
Hides a lot of secrets by yourself
Cheerful, funny, friendly and easygoing
A hardcore inspirit

Jung Daehyun

Cute, Naughty, Sweet, Adorable
Able to know people's personality in one look
Met him by coincidence

Lee Howon (Hoya)

Cute, y, has a confusing 2 personalities
Able to make you follow his words and make his faults look like yours
Your bias ever since you're a teenager

Best.Absolute.Perfect:

Bang Yongguk
Leader
Stubborn, strict, emotional

Kim Himchan
Same age with Yongguk
Yongguk's best friend that followed him around

Jung Daehyun
1/2 main male character
Romantic, funny, shikshin

Yoo Youngjae
Same age with Daehyun
Daehyun's smart bestfriend

Moon Jongup
A dongsaeng that adores Daehyun
Innocent and bright

Choi Junhong (Zelo)
Maknae
Innocent and cute

Infinite:

Kim Sunggyu
Leader
Charismatic, loves to nag, bullied by dongsaeng

Jang Dongwoo
Friendly to everyone
Bright and positive

Nam Woohyun
Aegyo and heart-thrower
Greasy and annoying

Lee Howon (Hoya)
1/2 main male character
Has two different personalities, can somehow make you follow his words

Lee Sungyeol
Really tall
Playful choding

Kim Myungsoo (L)
VIsual
Cool but dorky

Lee Sungjong
Maknae
Tries to be manly but he's just not