How do you use Pronoun to help the reader not to get confused in the scene with so many characters involved?
It depends on the scene, the characters involved and on who is doing the narration.
If for example, the scene involves the MC, a girl and a boy, it's usually pretty easy to refer to each person just by using "I", "him" and "her", but it's obviously not that easy when there are 4+ people involved or MC + 2 girls or MC + 2 boys.
You do have a few options though, referring to characters as "the former" and "the latter" in the middle of a sentence that they were already referenced is a way, for example.
At other times, just using the usual "he/she" or "him/her" will usually be clear on whom it is referencing due to context.
... And sometimes you might just need to use the same person's name multiple times in a sentence because nothing else works. It's annoying, but it's better than causing confusion.
? You mean basic language?
Yes, you mean. Pronouns are per definitionem a substitute of nouns and serve as a basic element of syntax and language. Now use logic and basic grammatical rules and you will find a solution to your problem. Epitheta help too in your case.
Honest question... Why are you even answering in this thread?
Like... OP is asking for help in writing, and what you did was to... Show off? Like, do you really think anything you said could help anyone out?
I mean, do whatever you want, but if someone is asking a question and you bother with making a reply, at least try actually helping the person in question?