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Tsukihiko Amō (天羽 月彦 Amō Tsukihiko?) is a S-rank agent and a Black Trigger user.
Amō is a young boy with messy neck-length black hair and narrow, grey-yellow eyes. His skin is pale with a light tan. He wears blue jeans, red shoes and a white hoodie.
According to Karasawa, his behavior is troublesome and could pose a potential liability for Border if publicly displayed. He seems to be a thorough person, going so far as to destroy a large portion of the Forbidden Zone when defeating trion Soldiers during the invasion. He also seems to enjoy challenges, and is bored by weak opponents.
He seems to have a good relationship with his former fellow S-rank agent. He fulfilled Jin's request without much complaint and was later seen enjoying some of Jin's rice crackers with a blissful look on his face.
- According to Ashihara, his image of design is abandoned dog.
- In Japanese, his name Amō (天羽) means "heaven's feather"; Tsuki (月) means "moon" and hiko (彦) is a male noble (male version of hime) and it is also a common ending for boys' names.
- He likes water, hamburgers, chocolate, and fighting with strong opponents.