It can be hard to make a character in a story human. What I mean by that is to have the character be a almost real person with real attitudes and feelings. A making that character have attitudes, feelings, and behaviors can be hard. It's best to just gradually let the reader know who the character is, rather than just saying. "He was a annoying and bothersome person." Although some of that can be okay it's a good idea to describe a character in the actions that they do, not just saying what they are like.
Making a character "humanized" can be difficult,but once you get used to how to do it, it'll come easy. If you wanted an annoying and dirty character always lurking hunched by another persons legs, that character could by constantly agreeing with everything the other person does and disagreeing, so that there is always something around to bother the main character.