Be who you are.
Never let another person make you do something you are uncomfortable about. Never feel obligated to be someone you're not or do something for someone else's benefit especially it is something you really don't want to do. I am not saying don't try new things. There is a big difference between stepping out of your comfort zone and being truly uncomfortable with a situation.
I am thinking a Ninja would be true to themselves and if you tried to force them to be anything else there would be some ninja consequences. If you know what I am sayin'.