hello mods... i'm working on my app and have a particular question that might be selfish to ask BUT here i am

i'm planning on apping cinnabar from houseki no kuni, who is a mineral life form made of cinnabar. like their real life stone counterpart, they are toxic to organic life because they secrete a mercury compound. in canon, it floats around them and they have the ability to control it to some degree and use it as a weapon, which would obviously be nerfed. however, they don't have complete control of it and it's always seeping out of their body, which means they generally can't touch anyone and lead an isolated lifestyle - this is a very important part of their character. would it be possible for them to arrive with the physical property of being poisonous (since i'm not planning on humanizing them) but without the ability to control it and fight with it as they do in canon, with that being something to possibly be regained later? it wouldn't be immediately fatal or anything, but maybe it would hurt a bit to touch them / it would make people feel sick. i also feel the need to note this would be useless as a combat ability because they're super fragile physically! it would just be for character purposes.