![](https://cdn.animecharacters.io/images/characters/large/61119-1e89a239.jpg)
Ratio (レシオ)
Ratio is another Hamatora PI with a doctorate. He is a doctor who helps Birthday out on handyman business. He is also a Hamatora PI, and Birthday's partner and childhood friend.
Animeography
![](https://cdn.animecharacters.io/images/anime/large/8293-43b955ff.jpg)
Hamatora The Animation
![](https://cdn.animecharacters.io/images/anime/large/8819-e40bb381.jpg)
Hamatora The Animation: Saishuukai Chokuzen! Mao ga Okuru
![](https://cdn.animecharacters.io/images/anime/large/8899-a58c8367.jpg)
Re:␣Hamatora
![](https://cdn.animecharacters.io/images/anime/large/10414-212a1102.jpg)
Mini Hama: Minimum Hamatora
![](https://cdn.animecharacters.io/images/anime/large/11122-07735d28.jpg)
Mini Hama: Minimum Hamatora Movies