Zhengxi Zhan

His name hanzi translates literally to "pure/honest hope".
His fan nickname '炸毛' is pronounced Zha Mao and literally translates to 'fried hair'.
His name is Nobumasa Nozomi in Japanese and Jeon Jeong-Hui in Korean.

Zhan Zhengxi has dark blonde hair, greyish blue eyes, and thick dark eyebrows and eyelashes. He is very fit and muscular from playing basketball a lot.

Out of the core group in the series, he has the most personal hobbies and has a lot of ways to occupy himself when not hanging out with the others. He enjoys reading, gaming, sports, and practicing drums, as well as playing with his sister. While he comes off as brash, smart, and nonchalant, Zhengxi is a very caring and silly person just like his friends; he just tends to hide it.

Zhan Zhengxi's childhood is very centred around Jian Yi, and how they became friends; flashbacks to his childhood also show the first sights of how deeply he cares for Jian, and how caring he is of a person in general.

(Source: 19 Days Fandom Wiki)