Pakkun is more so like an elder. He instructs and guides when he is summoned. He doesn't seem to have a sense of humor. He is not grouchy though but more like Kakashi in a way.
Pakkun is shown to be knowledgeable. He is mainly summoned by Kakashi as a guide, being experienced in danger situations and how to react, he has good judgement. Pakkun also is a good tracker who can track a person by their scent.