I did not the point of certain characters being in the series (i.e. Nam Joo Yeon) and other characters I had seen more of (Hong Joon, Kang Ah Young). Neverthelesss, I liked a lot of the main characters in the series.

Bo Ra always sticks up for Seol. Additionally, her bickering with Eun Taek is pretty comical.

Seol is a very strong character who doesn't let her life situation or peers get in the way of her studies.

Baek In Ha comes off as very needy, annoying, and a bully, but you see why she is the way she is through flashbacks of her experiences growing up. There's a lot of depth to her character.

Baek In Ho was my favorite character in the series because he is very dynamic. He picks on Seol and his sister a lot, yet he is very caring. He appears very tough, yet expresses a softer side to him when he plays the piano or when Seol or his sister get into trouble.

The one main character I didn't like as much was Yoo Jeong. He appears mean at the very beginning, then kinda creepy, and then more caring toward Seol. The transitions in his character seemed kinda abrupt. However, that could also be the point to his mysterious character, I dunno.

Overall, I would recommend this one, but maybe not put it at the top of your list.