| ID | 342 |
| Rarity | ★★★★★ |
| Class | Rider |
| True Name | Kōnstantînos XI |
| Gender | Male |
| Source | Historical fact |
| Region | Europe |
| Alignment | Lawful Good |
| Height | 171cm |
| Weight | 73kg |
| Strength | C |
| Endurance | A |
| Agility | C |
| Magic | D |
| Luck | C |
| Noble Phantasm | EX |
| Character Setting | Higashide Yuuichirou |
| Illustrator | Kurahana Chinatsu |
| Character Voice | Kamio Shinichiro |
| Major Appearances | Fate/Grand Order |