Hidayu

Hidayu is a samurai who allied with the Kozuki Family. After waiting 20 years for the return of the Nine Red Scabbards, he affiliated with the Ninja-Pirate-Mink-Samurai Alliance to raid Onigashima.

Appearance
Hidayu is a stocky, tan-skinned man with navy blue hair that is shaved, a slight widow's peak, and think eyebrows, a mustache and goatee that look like kumadori makeup. He wears a brown kimono with an orange circular pattern on it. He sometimes wears a white scarf over his head or a light-colored cloak with a zig-zag pattern on the sleeves. He has a reverse crescent moon tattoo on his ankle.

Personality
Hidayu is loyal to the Kozuki Family and often maintains a stern, stoic expression. He was hesitant to believe the Kozuki Family had returned to usurp Orochi, but was faithful after being imprisoned. He broke his normal expression when he joined the Onigashima raid after Denjiro freed him, smiling and cheering, and again after Big Mom attacked his comrades, gritting his teeth and showing concern.

Abilities and Powers
As a samurai, Hidayu is likely proficient at combat. However, he has not been seen carrying a weapon.

Past
In the past, Hidayu was allied with the Kozuki Family. After hearing Kozuki Toki's prophesied the downfall of Kurozumi Orochi and the opening of Wano Country's borders, Hidayu and his allies waited for 20 years for the Nine Red Scabbards' return and got reverse crescent moon tattoos to identify themselves.

Wano Country Arc
Hidayu was carrying a log through the Flower Capital when he passed either Usopp, Shachi, Bepo, or Penguin and was handed a piece of paper. He read the cryptic message on it and wondered if it was true.

Hidayu was among those arrested and thrown in Rasetsu Town for conspiring to defy Orochi. In prison, he and the others received Shimotsuki Yasuie's final message of the rebels' new gathering place. The group watched as the Straw Hat Pirates saved Toko and fought off Orochi's subordinates. Two days before the raid, he and his comrades still patiently waited, trapped in Rasetsu Town.

On the day of the Fire Festival, Hidayu and the other rebels were freed from Rasetsu Town by Denjiro, adding 1,000 soldiers to the raid's forces. The group sailed to Tokage Port to retrieve the Scabbards and commence the raid.

Hidayu joined the resistance and traveled with the Kozuki Family's other allies to Onigashima, looking toward the Skull Dome's entrance as they approached.

Hidayu joined Kin'emon's Eastern forces, and the group approached a brothel. The group split up but heard someone from inside the brothel. They all jumped in the water to hide, except Chopper and Usopp who were riding in the Brachio Tank V.

When Big Mom charged at the samurai and blew a hole in the Skull Dome with Ikoku, Hidayu and his comrades were surprised and intimidated.

Trivia

 * Part of his name means "fire" (火), likely a reference to his flame-like eyebrows and facial hair.