Honoboono has a yellow, gaseous-looking body, with diminutive arms. He sports squinty eyes, a wide mouth, and a green mustache, vaguely resembling a Dali style. His hair is green and styled to resemble a normal haircut, and has a daisy on the top.

Honoboono shows a cheerful disposition, which is evidenced by his constant smile. He is calm, gentle and most of the time, he tries to solve problems in a peaceful manner, for it is the main reason of his summoning by Keita.

In the Japanese versions, he always ends his statements with "-bono". In the U.S. translated dub, he is characterized with a French accent, ending some phrases with "hohoho."

Honoboono's aura warms and smooths the atmosphere where he is present, ensuring a cheerful and amiable disposition of the people on it. Said aura can negate the dampening effects of Don'yoriinu, normalizing the atmosphere. This ability has also been shown to negate Sunesnake's inspiriting.