Eingyi

Eingyi is a minor character in Dark Souls. Heavily burdened with infected eggs, he is a pyromancer who is devoted to serving Quelaag's Sister.

Location
Found in the chamber behind the illusory wall in Quelaag's Domain.

Plot
Eingyi uses his body to guard the entrance to Quelaag's Sister. He will ask the player if he/she is there to serve his master; the player must answer yes to access Quelaag's Sister (and thus Chaos Servant).

Initially, Eingyi will only sell the Servant Roster to the player after the player joins Chaos Servant. However, if the player becomes infected with eggs, Eingyi displays more respect towards the player and will also sell him Egg Vermifuges, Poison Mist, and Toxic Mist. Eingyi is initially mistrustful of the player, but if the player becomes infected with eggs and/or talks to Quelaag's Sister wearing the Old Witch's Ring, he gradually warms up towards the player, and will offer the player a pyromancy flame should the player desire it.

Should the player kill Quelaag's Sister, Eingyi becomes enraged and will do his best to avenge his master's death.

Strategy
In terms of combat, Eingyi is identical to the other egg-bearers: he will feebly swing with his arms, attack with the maggots in his eggs, and (when he dies) will release a swarm of small maggots to attack the player. He also has a chance to infect the player with eggs. He is also extremely frail and slow. Area of effect attacks make short work of both him and his maggots.

Backstory
Eingyi was originally a pyromancer from The Great Swamp. However, he was cast out of his home due to the perverse nature of his pyromancies. He became affected with the unknown blight that plagued the people who travelled with the former Chaos Witches; however, Quelaag's Sister felt pity for him and his kin, and sucked out the blight pus from them. The action caused her to be gravely ill and also resulted in his total dedication to her.

Although Eingyi is devoted to Quelaag's Sister, he cannot speak her language; everything he knows about her and her past is through observation and extrapolation.