Justice Tachibana is a character from the anime Battle Spirits Sword Eyes, where he serves as one of the three messengers of the gods, alongside Galaxy Watanabe and Bomber. Originating as the third mascot for the Battle Spirits trading card game, his background establishes him as a figure who comes from the future, and his signature catchphrase is "This is my justice!!". In Sword Eyes, he is depicted as a divine being who generally prefers not to interfere directly in human affairs, yet he possesses a notable fondness for melon bread. His personality is defined by a hands-off, observational approach, as he believes in allowing events to unfold naturally, though he is willing to step in when he deems it necessary to test or guide key individuals.

Justice Tachibana's motivations are rooted in his role as a divine messenger, tasked with observing the conflict between light and darkness. However, his actions reveal a deeper interest in testing the resolve and potential of humans, particularly the protagonist Tsurugi Tatewaki and his rival Yaiba. Long before the main events of the story, Justice gave a jewel staff to a young Grenada, prophesying that she would become a mother to the forces of light and dark, a prediction that came true with the birth of her sons, Yaiba and Tsurugi. In the present timeline, he demonstrates his commitment to this principle by battling Tsurugi on two separate occasions. In their first duel, Justice used an exact replica of Yaiba's deck, including the powerful Sword Brave, to help Tsurugi understand his opponent's strategies; after losing, he rewarded Tsurugi with three copies of the card Flame Field. In their second battle, Justice used a copy of Tsurugi's own light deck to test whether Tsurugi could maintain control over the chaotic power of having obtained both the Sword Eyes of Light and Darkness. During this fight, Justice expressed his honest uncertainty about the outcome, as Tsurugi was the first person in history to possess both powers, and his goal was simply to measure Tsurugi's seriousness. Justice also engaged Yaiba in battle using a burst deck, though this encounter also ended in defeat for the messenger.

Justice Tachibana's key relationships are central to his function in Sword Eyes. He acts as a mentor figure and a trial-giver for Tsurugi, while his connection to Grenada ties him directly to the core conflict of the series. His interactions with Yaiba are more adversarial, as he challenges the dark Sword Eye user directly. Alongside his fellow messengers Galaxy Watanabe and Bomber, Justice eventually shares a pivotal moment of defiance, as the three choose to betray the being known as God, then using Garudos as a vessel. This act of rebellion results in the permanent loss of their divine powers. In terms of character development, Justice transitions from a distant, non-interfering divine observer to an active participant who sacrifices his godly status for the sake of the mortal world. Following the resolution of the conflict and the birth of a new world, Justice's development culminates in a peaceful, humble existence. The epilogue of Sword Eyes shows him living in this newly formed world, where he spends his time playing Battle Spirits with children, having fully integrated into human life. Regarding his notable abilities, Justice is an exceptionally skilled Battle Spirits player capable of precisely replicating the decks and strategies of others, as seen when he used exact copies of both Yaiba's and Tsurugi's decks. As a messenger of the gods, he originally possessed divine powers, including the ability to bestow prophetic gifts, though these abilities were lost after his betrayal. He is also associated with the sword known as the JusticeHolySword Justicesword and appears on the card Justice Burst.