Who is the mystery figure next to NCT's Shotaro?

Article: NCT Shotaro's 'Growl' TikTok, who is next to him? new NCT member? trainee?

Source: Idol Issue via Instagram

1. [+344] Stop adding more members, damn

2. [+214] Taro-ya, grandma's here. How is our Taro doing, have you been eating well? Grandma's well, too. Who is your friend by your side? I'm getting really pissed at the prospect of it being a new member...

3. [+141] No way ^^ it can't be a new member, right? SM-nim??? Come on, it can't be~~~ it can't be~~~~

4. [+84] Amazing dance skills

5. [+53] Sigh, our Dalho looks amazing in a school uniform.. ㅠㅠㅠㅠㅠ

6. [+21] Taro-ya ㅜㅜ please promote more ㅜㅜㅜ

7. [+66] Really pissing me off with all this talk about a new member

8. [+16] Wow, a new member? ㅋㅋㅋ That really pisses me off

9. [+13] No but really, who is that next to him? I thought it was Injun but it's not, who is it