__Height:__ 179cm / 5'10"
__Initial Persona:__ Helios 
__Ultimate Persona:__ Hyperion

Katsuya Suou is Tatsuya Suou's older brother, a by-the-books sergeant from the Kounan Police Department who followed in his father's footsteps to become a cop. Katsuya is a detective specializing in investigating arsons. However, Katsuya actually wanted to become a pastry chef, but dropped his dream to become a police officer, driven to clear his father's name after he was disgraced while investigating Tatsuya Sudou's arsons. While he appears strict and harsh to Tatsuya, he does care for him, warning him to find shelter when things begin to get out of hand.

In Persona 2: Eternal Punishment, he becomes a playable character, awakening to his Persona Helios during a confrontation with the serial killer Joker.

An anthology of short stories by various mangaka, published by Ichijinsha in honor of the Persona 2: Innocent Sin PSP remake.
 
1. P [Taihei Hiromi] 
2. Uwasa no Akuma wo Buttaose! [Katou Michiru] 
3. Satomi Tadashi nite [Yanagiya Maro] 
4. Kimi no Ushiro [Kari Erika] 
5. Saa Docchi!? [Sanada Juan] 
6. Soreyuke Gold Tankentai [Tsukiyama Ryuuji] 
7. Nana Shimai Gakuen Shinbunbu Buchou no Shinsou [KAY] 
8. Hataraku Oneesan [Ookami Wakana] 
9. Nayameru Seishounen [Aoba Hayato] 
10. Hara ga Hette wa [Sakazaki Mei] 
11. Sengen Shimashita. [Shiroishi Kotoni] 
12. Uwasa no Gas Chamber [Itsuki Makoto] 
13. Komatta Ippiki Ookami [Hayase Reku] 
14. Houkago Uwasa Jikan [Iwai Tomo]