Might be one of your friends? Or just a kid.

I assume that Nikki is their sister, and she’s bothering them by leaving all those comments, and just has to express their feeling... In the comments... Kids are weird

Likely someone who plays the game and claims to be 'aN eXpUrRt LuLz'

Well the only thing I can say is that they may be trolling you, but they're still giving your channel analytic increases with each comment. So I'd say try to ignore it unless they're truly being mean, and hopefully they'll stop when they realize it's no longer getting attention.

Block him if you must.

Looks to me like they're liking all their comments too.

It’s a kid thinking it’s a live chat 100%

They think they're funny and quirky and random and totally trolling you or they're just genuinely confused and have some lack of logical understanding

No big deal, it’s just confusion and it’s just a kid.