Boingo

Boingo is a short child with large eyes, a long mouth, and tall, curly hair. He wears a backwards visor, which leaves several long but thin bangs to hang over his face. His apparel consists of several layers: an unbuttoned coat that extends past his knees with dark short sleeves and an upturned collar, a long-sleeve shirt, baggy pants, dark shorts, and shoes. In the anime, his coat's sleeves are the same color as the torso, and he does not have shorts over his pants.

In the spin-off Crazy Diamond's Demonic Heartbreak, which is set in 1999, Boingo has kept his outfit and short height, but is shown to have faint stubble.

As a young boy, Boingo is very introverted and timid. He prefers to act as support for his companions by showing the predictions of his Tohth rather than directly taking action. He is only comfortable around his brother, Oingo, sticking close to him and feeling lonely while away from him. His bond with his brother is deep enough that he promises to take revenge for Oingo's defeat all by himself, which causes Oingo to tear up. He is willing to interact with kind strangers, but he prefers to stay silent. With ruder strangers such as Hol Horse, he takes to hiding and often stutters in his speech.

Despite his typical reserved nature, he is absolutely confident in his Stand's predictions, often reassuring that they are "one hundred percent, absolutely correct." He even finds joy in the infallibility of his Stand, letting out a bizarre, loud laugh at the thought of it.

Although seemingly a normal boy, Boingo has a somewhat dark personality. He laughs at the thought of the Joestar group dying and has no qualms with his brother punching someone whose face they found annoying and stealing his wallet. He further shows his violent side when he vows to take revenge and kill Jotaro and his companions by himself.

After Hol Horse's defeat, Boingo has a change of personality and begins to believe that revenge is pointless. He decides to forget about Jotaro and only use his predictions to help people in the future, believing that this will bring true happiness to him and his brother. This optimism, however, is short-lived, as an annoyed Iggy pounces on him, sending him to the hospital and back to his old, shy self.

Crazy Heartbreakers

The information below derives from Crazy Diamond's Demonic Heartbreak or its novelization Crazy Heartbreakers, which were not written by Araki.

In the spin-off Crazy Diamond's Demonic Heartbreak, Boingo seems to have largely remained the same withdrawn man as he was during his childhood. He seems to be friends with Mariah, as she attacks Hol Horse to avenge Boingo for having been used. Boingo himself seems to not like Hol Horse and asks him to never get involved with him again after fulfilling the mission to find a missing parrot. It is also shown that Boingo is still deeply afraid of DIO and even simply remembering him makes his shudder.

Stand

Debut: Chapter 189 / SC Episode 26

Type: Automatic, Range Irrelevant, Foresight, Materialized, Phenomenon (Other)

Ability: Future Prediction

Tohth is a comic-book-like Stand whose whimsical story periodically updates itself to predict the close future with 100% accuracy.