When it comes to the friendzone, think about how a native English speaker would say it in English.
So as long as they're keeping it casual, just go with "Sis" or "Sister" instead of spelling the whole thing out every time. We already know what her name is.
the secret reason this dude never does anything on his own
is because he's playing one of those shitty rpgs where you can only heal ppl after they take damage
mc needs to be more proactive, as is he just lets shit happen so he can react to it
@qelix yea this dude sucks. wheres his fucking plan?
edgy loser that needs an excuse for revenge, he can see it happening, so why not do something about it before it happens?
Also keep in mind these aren't our humans and we don't know how that changes things. Like posters for previous chapters commented "they forgot intersex?" well that might not actually exist in this setting.