Trinita

Trinita (トリニータ) is a minor character who only appears in The Book: 4th Another Day novel, based on Diamond Is Unbreakable.

Appearance
Trinita is described as a male white cat with a pretty face and short fur.

The cat had a black cloth collar with a silver heart-shaped nameplate hanging from it, along with a phone number and the owner's name written.

Personality
Trinita had spend her days with Hanae and held affection towards her.

History
Trinita was a cat who, alongside her mother, belonged to Hanae Orikasa.

The Book: 4th Another Day
Trinita was Hanae Orikasa's cat. She saw her master talking with a "student with red marks on his arms" moments before her death and escaped to the street, but was soaked in blood. Trinita was eventually found in a bloody state by Rohan Kishibe and Koichi Hirose, who found Hanae's body after looking for Trinita's master. Trinita was kept at the police station during the investigation, but was retrieved from there by Koichi so Rohan could use Heaven's Door on the cat and find clues about who was the killer. Koichi then took Trinita back at the police station.