Miraculous Holders gain the ability to talk to their patron animal. Ladybugs don’t have a whole lot to say, so Marinette doesn’t really use it, but cats… Adrien spends SO MUCH TIME talking to cats, and they give him advice (not always good advice) and stuff. And then one day a teeny little calico comes to Chat Noir, shaky and hungry but says she has a human kitten at home who is scared and hurting and he needs a hero. Picture Chat Noir with a veritable army of feline spies around Paris, reporting things back to him and coming to him for help. “Chat Noir, help me find a safe place for my kittens.” “Chat Noir, my human’s mate strikes her.” “Chat Noir, my human is old and sad and alone, how can I help him?” And as Adrien or Chat Noir, he does what he can, because being a hero is about more than the big things. Picture this.
On one hand killing off Toffee that easily would be seen as “anti-climatic” or “Too soon” and we still have another season after this one, and he was so far the best villain and will be difficult to top, but on the other hand that was the most epic and most fitting way to kill him off.