I understand your point about the decision to make the meander look like a kangaroo but for the sake of imagination I thought it might be good to give people a reference. I could however go back and add a bit more description to really highlight the fact that it is no kangaroo indeed although it bears slight resemblance to one. Yes, I think its fun learning more about the characters through backstories. There's a lot you can do with them as well. Brag didn't really get described well enough for readers to really feel they know him. Perhaps that leaves a lot of mystery to him which can later be used?