Raijinmaru

Raijinmaru is a resident in Tamakoma Branch and Yōtarō Rindō's pet. She is also Border's crown trigger, whose duty is to protect the Aristeran prince, Yōtarō Rindō. Raijinmaru is also known for her "extremely soft and fluffy belly fur."

Appearance
Raijinmaru looks like a fairly common capybara, with a large head, big body, and short, thin legs. Her body is covered mostly in light brown fur, with darker fur coating the tip of her snout, limbs and the top parts of her ears.

Personality
Not much is known about Raijinmaru's personality, but she seems to be a very lazy, laid back, and gluttonous capybara. However, should Yōtarō be in any serious danger, she is capable of becoming very destructive to quell the threat.

History
Raijinmaru was Border's crown trigger whose purpose was to defend Yōtarō. She joined Border during its debut.

Black Trigger Capture Arc
Raijinmaru appears multiple times in Tamakoma Branch, with Yōtarō seen on numerous occasions riding, petting, or rubbing her stomach.

Border Enlistment Arc
She is seen with Yōtarō atop her after Osamu's battle with Midorikawa. Yoneya was babysitting him for his cousin.

B-Rank Wars Arc
Yōtarō sits on top of her while watching the rank wars. During Galopoula's Invasion, Yōtarō rides on her in search of Hyuse to return Lampyris to him.

near the end of the final upper group match, Raijinmaru is shown to be on top of Izuho's lap.

Abilities
Not much is known about her abilities but as a Crown Trigger it can be assumed that she is strong especially considering Jin was ready to interfere during Galopoula's Invasion and even stated that she would, "turned the whole area into a fiery wasteland".

Trivia

 * Raijinmaru is actually female, contrary to Tamakoma members' beliefs.
 * "Raijin" (雷神) is the Shintō god of lightning, thunder, and storms. "Maru" (丸), meaning "perfection" or "full circle", is a common suffix for Japanese male names (despite the fact that Raijinmaru is a female).
 * Raijinmaru's name comes from the dog of Yōtarō's favourite television hero.
 * According to Border Briefing File, Raijinmaru is both Border's most popular and the least concerned with popularity, while Yuiga is both the least popular and the most concerned with popularity.
 * Kazama has been caught on camera attempting to ride, or at least get on, Raijinmaru while intoxicated.