Akumi Hyūga

Akumi Hyuga is the best friend of Aoki Hyūga after growing up with each other and teaching each other their skills to become the very best. Aoki Hyūga, who is obsessed with learning more jutsu and learning more of the shinobi history has sort of rubbed onto Akumi after all the years of travelling, fighting and growing up with him. During their time in the Akatsuki, they weren't partnered together but still remained best friends after their long service to the mercenary mob.

Background
Basically mirroring his friends life, Aoki Hyūga. Akumi grew up in an average life, although he did struggle at genjutsu and taijutsu but has a large reserve of chakra and after learning with Aoki, they mastered chakra control and they both came up with the ability, chakra chains ability.

During his academy days. Akumi wasn't the brightest unlike his friend, but would always accompany him on his adventure to ruins or to the library to study ninjutsu techniques. As Aoki Hyūga and Akumi both grew up with Hyūga Clan lineage, people would mistaken them for siblings which resulted in them becoming close together after a rival of who would be the better Hyuga. Even though it still continues today, that childhood rivalry. After Aoki Hyūga, their team captain and other team member had completed their first mission it was time for the attempt of a second Chunin Exams to start. Akumi was so excited to be able to test out his new skills in the chunin especially to the fact that he has greatly improved his taijutsu abilities, compared to when he was a Genin.