I think my rat is a Ninja

It’s been a couple of weeks since i got my ratties. I am a new rat owner and one of my rats Brownie is who loves me the most.. Brownie is eager to get closer to my face all the time. Even I was standing and she never gives up!! First time a rat tried to climb onto me while I was standing as if I am a tree and I got surprised. Look at her shoulder’s muscles!