Often identified with the sun, Horus was known as one of the most powerful of the Egyptian pantheon. Son of the god Osiris, he seeks revenge for his father's death at the hands of the treacherous Seth. It is said that he and Seth have a never-ending battle, and when the sun rises, Horus begins to triumph, but when the sun sets, Seth gains the upper hand.
The Pharaoh of Egypt was also thought to be the human personification of Horus, and was responsible for maintaining Ma'at, or balance, in Egypt. When the pharaoh died, he became the embodiment of Osiris.
Horus is a falcon-headed sun god in Egyptian mythology and the son of Osiris. He is most famous for his battle with the god Set for supremacy, losing an eye until he had it restored by Thoth. The gods passed judgment on the battle between Horus and Set, ultimately favoring Horus as the god of day. The "eye of Horus" symbol in Egyptian art represents healing.
Horus appears as a demon of the Deity Race in Shin Megami Tensei II. Aleph can recruit him after reaching Level 37 or above.
"An ancient god of Egypt whose eyes are the sun and moon. Revered by some as the chief god, and often depicted as a hawk or falcon."
—Persona 3 Compendium
Horus appears as a Persona of the Sun Arcana in Persona 3. He is available to be summoned once the Protagonist reaches Lv. 63 or above.
Persona 3 FES
Horus returns as a Persona of the Sun Arcana in Persona 3: FES, retaining his attributes. In the playable epilogue of FES, titled The Answer, Aigis can also summon Horus by fusing the appropriate Personas in the Velvet Room.
Horus returns as a Persona of the Sun Arcana in Persona 4. He is available to be summoned once the Protagonist reaches Lv. 68 or above. Alternatively, the Persona Horus can also be obtained via Shuffle Time.
Digital Devil Saga: Avatar Tuner
Horus appears as a boss in Digital Devil Saga: Avatar Tuner in the final dungeon, Sahasrara. Late-in game in the events of the Embryon's effort to find Sera after her sudden departure from the party. Horus is fought after defeating Jatayu and Garuda and ascending to the high planes of Sahasrara. Later, Horus becomes a normal enemy encounter. One of its weaknesses is gunfire.
Horus is also one of the few rare enemies that drops Noises (Data Nodes in the original Japanese version), in this case Horus drops the HP Noise, allowing players to upgrade the party character's HP permanently. As well as Magic Noise, offering a +2 increase to the user's magic stat, in some locations.
Devil Children White Book
Horus is a boss in the game, serving as an agent of the Angels. He attempts to kill Masaki Kuzuha because of his nature as a Devil Child, viewing it as unclean along with the fact that those with the same power have proved troublesome for the Angels in the past. After the fight he is surprised at his own defeat and dies.
DemiKids Light & Dark
"Immortal demon with a falcon's head. Its eyes harness the powers of both sun and moon."