Having a trope doesn't make your story bad: they are tropes for a reason. However, don't repeat what others have said, say your own things. A...
If they hear Sir Gay, and that ruins the story for them, then they're an immature moron. If you like Sergei, keep Sergei. I just heard Sergei...
whom is usually used if the answer you want is to be expressed as him/her. "whomever do you mean?" "Him." who is for he/she "who took that?" "she...
Separate names with a comma.