He is one of the Yo-kai required to unlock Shogunyan.
Happierre 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.
Happierre 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 Nathan.
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."
Happierre'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 Dismarelda, normalizing the atmosphere. This ability has also been shown to negate Cynake's inspiriting.
Dismarelda is Happierre's wife, and the couple usually get along very well. However, sometimes they tend to argue with each other. When not, they spend time together, as seen with having vacations in Hawaii and going shopping.
Happierre appears on Blossom Heights and in the trees of the Excellent Expressway in the Present, and Station South (Old Springdale).
In the anime
Happierre makes his debut in the first episode of the anime, EP001, when Whisper brings him to Nathan's house in order to make amends with Dismarelda and thus, preventing Nathan's parents to break their marriage due to her aura. Dismarelda quickly makes peace with Happierre, and the resulting combination of their auras eases the atmosphere and causes Nathan's parents to do the same. Sometime after leaving, he and Dismarelda give Nate their Yo-kai Medals.
Happierre and Dismarelda both make cameo appearances in EP002. Nate tries to summon Happierre with the Yo-kai Watch, while Happierre says they can't come because they're vacationing in Hawaii.
Happierre is summoned by Nate in EP006, and asks him if he could do something to calm down Katie. With his happy aura, he successfully does so.
Happierre and Dismarelda are both summoned by Nate in EP008 to try and get Jibanyan out of Nate's room. They melt under the door and slide Jibanyan out. They then leave to go to their romantic getaway.
In EP027, Happierre was seen in Yo-kai-lifornia. He was seen in line waiting for the release of the new Yo-kai Watch Model Zero while Dismarelda did some shopping at the nearby stores.
Happierre's first appearance in the first Yo-kai Watch video game parallels his first appearance in the anime, with the difference being that he does not give his Yo-kai Medal to the player before leaving.
Happierre's marriage to Dismarelda could be a nod to the old adage "opposites attract" as both Yo-Kai have romantic interest in one another but have complete opposite personalities and effects on humans.
During a case that Inaho and USApyon took on, it is revealed that Dismerelda and Happierre were a couple back when they were alive as well.
The only two times when Happierre got angry are in EP073 when Irewig used his pincers to poke him and in EP107 when he finds out that Whisper can't even remember his name.
In episode 145, it is shown that Happierre has legs.
In the Spain Spanish dub, Happierre speaks with an Argentina accent.
"Happierre" is a portmanteau of happy and the male name Pierre, reflecting his French accent. Coincidentally, he shares the same name as Pierre Holloway, the pseudonym of his voice actor, Paul Greenberg.
"Honobōno" is a play on honobono (ほのぼの, "heartwarming")