Tsukikage/Relationship

Hikage
Tsukikage and his brother Hikage have been shown to have a good relationship, both coming from the Fūma Duel School. They were both hired by Reiji to ensure the safety of Serena and worked effectively to protect her. After Hikage was defeated by Sora and sealed into a card, Tsukikage sought vengeance against his brother and was angry at Sora and attempted to duel him, before both made a mutual agreement with the help of Yuzu, to take Yuzu underground whilst Sora helped Yūya. He is angered when someone disrespects the Fūma Clan, as he feels it disrespects his brother and his noble sacrifice.

Reiji Akaba
Reiji hired Tsukikage, along with Hikage, to protect Serena. In accordance to his philosophy from the Fūma clan, Tsukikage obeys Reiji's instructions, such as rescuing Reira and losing to Shinji on purpose to infiltrate the Underground Labor Facility. He believes Reiji to be loyal to his comrades and would have not served him if he viewed them as disposable.

Serena
After being hired by Reiji, Tsukikage, along with his brother, sought to protect Serena as per his mission, he protected her as well as Shun from Obelisk Force during their duel and was able to get them to safety, away from Obelisk Force. He showed concern for her whilst she was weakened with nerve gas, and refused to abandon her when she requested to, as his mission was to bring her to safety.

Reira Akaba
As a part of his orders from Reiji, he rescued Reira when Security attacked. However Reira became jealous, mistakenly believing Reiji to be favoring Tsukikage over him, worried that he might lose Reiji and during his duel with Shinji, desired his defeat, was worried whenever he gained an advantage, and was happy when he eventually lost. However he eventually apologised for this behaviour, which Tsukikage accepted.

Whilst escaping from Obelisk Force troops after rescuing Serena, he was concerned about Reira who was exhausted after dueling Security but trusted him to protect Serena.

Sora Shiun'in
Due to Sora previously defeating Tsukikage's brother, Hikage, and sealing him into a card, Tsukikage was vengeful and angry at Sora, and attempted to defeat him in a duel, until Sora backed down due to the words of Yuzu, as Sora was beginning to have his doubts about his mission, he also apologised for sealing Hikage into a card. Sora stated that he would let Tsukikage seek his vengeance later, but requested he wait until Sora had helped Yūya, something which Tsukikage agreed too.

Later, just before Tsukikage was defeated by the Obelisk Force, Sora appeared and saved Tsukikage, much to his surprise. Tsukikage assisted Sora, which allowed him to defeat the Obelisk Force. Afterwards Sora told him that he knew that saving him wouldn't make up for sealing Hikage into a card, to which Tsukikage replied that grudges are never ending, but thanked him for his help, showing Tsukikage is beginning to slowly beginning to forgive Sora.