PLEASE HELP!!!

I need to make a character that is difficult to predict and figure out, 更多 complicated etc. According to my English teacher they are called Round Characters..... I need to describe the appearance of a character without saying anything about his 或者 her personality directly. So far... His name is Seth and i need details about him( his appearance) like clothes, shoes, hair etc.
I need some 答案 as soon as possible!