Peniro

Peniro is the het ship between Peni Parker and Hiro Hamada from the Spider-Verse and Big Hero 6 fandoms.

Canon
Both Hiro and Peni are based on Marvel comic characters, that inspired Disney and Sony to base a film on them. Their film counterparts has the most resent attention and focus when it comes to the two lately.

In both their original comics and adoption films, their robotic friends were originally created by one of their family members who had died (Peni's father and Hiro's older brother). Hiro's original Marvel self, Hiro Takachiho had modelled Baymax after his late father, while Peni had updated her father's creation when she became a hero. With no parents to look after them, Hiro and Peni get taken in by their aunts. The two are also young teenage geniuses, who know their way around tech and robotics.

Fanon
Once people saw Sony's take on Peni Parker for their Into the Spider-Verse film, they got inspired to cross ship her with Hiro Hamada. Who is also a Marvel based character and has a red armoured robot for a best friend. That is why people like to include their robotic friends in their Peniro fanworks. Although the ship commonly focuses on 2018 Peni, there are those who would rather feature Hiro with her original Marvel comic book self. Just as there are those who pair them up as lovers, another group prefers to have them as friends or simply cousins.

With the two being (half/whole) Japanese, the idea of having them as cousins came easily. Some feel that comic Peni wouldn't get along with Hiro as film Peni would. Along with having their comic counterparts as rivals, before becoming friends. Because their film selves has the most attention, it has those feel that their comic book selves deserve attention too. That is why their original selves have popped up from time to time.

Since Hiro has been featured as a spider-themed hero from time to time, in Marvel/Spider-Man related AU's, shipping him one came natural. As Hiro is sometimes featured as a friend of Peter Parker, from having some Peter Parker-like traits, and his original comic self had once teamed up with Spider-Man. Even though Hiro is mostly seen as a Disney character, there are those who still consider him a Marvel character. The same with Sony's version of Peni. Which could have Peniro be viewed as a Marvel ship than just a Disney/Sony crossover ship.

Although the ship doesn't have much support on fanfic websites, it does have reasonable size ones on sites that allows people to showcase their fanart and thoughts on it. DeviantArt has a fan group on it, and already has quite a few artworks of Peniro in its folders.

Peni Parker wasn't the first Penny that Hiro was cross shipped with. The first being Penny Forrester from Disney's 2008 film, Bolt. Thanks to the extra "n" in Penniro (Penny Forrester x Hiro), is saves confusion between the two ships. Penniro, however, tends to overshadow Peniro, with the Disney crossover ship being created long before the 2018 film was released. Along with Penniro being part of the Modern/Futuristic Four crossover fandom, while Peniro is part of the Disney/Marvel(/Sony) fandom. Despite not being as popular and well known as Penniro, Peniro still has a few loyal supporters. Even though some feel that Hiro had traded one Penny for another Peni.

Fandom
FAN ART

Trivia

 * At the end of Across the Spider-Verse, Peni is seen wearing a coat that is a little similar to the one Hiro Takachiho wears in the original Marvel comics of Big Hero 6.
 * Hiro Takachiho is who Hiro Hamada was based on.