Triglav (トリグラフ, Torigurafu)? is a demon in the series.
Triglav is a god or complex of gods in Slavic mythology, similar in nature to the Trinity in Christianity. Triglav is a unity of three gods. The exact members of the triad vary by place and time. An early variation included Svarog, Perun, and Dajbog. Later, Dajbog was replaced by Svetovid or Veles. Triglav is usually described as a fusion of these gods. More rarely he is said to be their son. It may also be a unity of lesser gods (Lesser Triglav).
Devil Summoner: Raidou Kuzunoha vs The Soulless Army
"A Slavic god whose name means "three heads". He rode a holy black horse in contrast to Sventovit, who rode a white horse."
—Devil Summoner Devil Chart
Megami Ibunroku Persona
Triglav is the second Persona of the Justice Arcana. As this Persona ranks up, most of the stat increases that it receives are invested in Strength and Vitality. Upon being returned to the Velvet Room at MAX Rank, it yields a Poisma Stone.
"A Slavic god whose name means "three heads". He rode a holy black horse, in contrast to Sventovit, who rode a white horse."