Jonathan Anderson. No idea how he came to be called Rat.
Rat used to roleplay with us back in the olden days before he got all mature and stuff, and was noted for his aggressive, some might say psycopathic, approach to problem-solving. He might have coined the phrase, "kill them all and let the gods sort them out". You could always count on an elevated body-count in any game Rat was playing in. If Rat was a spandex-clad superhero, you could count on him being called something like "Collateral Damage Man".
It's strange, because in real life he's really rather a nice chap.
Rat is the brother of Phil, and has recently been married to a very nice woman who I've only met briefly and can't remember the name of..... sorry. Brain like a sieve, that's me.