I've got a humanoid character who is occasionally a lion, too. In that form, he's named Jarmara. Mostly, he's got a bad personality, but he's not hopelessly rotten.
His mane doesn't get any larger. He's genetically impaired, I guess! Ha, and Tanidareal thought there were no badly maned lions out there. xD
Mine. Will lend him out for some fun, but stays mine, essentially. ;)