Aeseth

Patron.  At the end of a long rest, Aeseth hit point maximum increases an amount equal to her supplicant's maximum amount of hit dice + the supplicant's Charisma modifier + the supplicant's proficiency bonus.

Immortality. If Aeseth is ever killed, her supplicant receives one level of exhaustion, takes 3d6 psychic damage and reduces their hit point maximum by the psychic damage taken.  Both of these effects last until the end of the supplicants next long rest and nothing is capable of ending these effects early outside of the direct interference of a god.  Aeseth then rises to life at the end of her supplicant's next long rest.

If Aeseth's body is ever destroyed or missing a body part when she dies, her soul returns to the Nine Hells.  It remains there for 9 days reforming.  During this time, her supplicant's hit point maximum remains reduced, and has one level of exhaustion.  Nothing is capable of ending these effects early outside of the direct interference of a god.   

Infernal Destruction.  While within 100 feet of her supplicant, once per turn, the supplicant can deal an additional 1d6 necrotic or fire damage on an attack.

Infernal Healing.  While within 100 feet of her supplicant, the supplicant receives an additional 1d6 hit points when they receive magical healing.

Infernal Protection.  While within 100 feet of her supplicant, the supplicant can add their Charisma modifier to their Armor Class, provided they are not wielding a shield or wearing medium or heavy armor

Protect the Greater.  Any creature within 5 feet of Aeseth can use their reaction to impose disadvantage on an attack roll against her, reduce damage from an attack to her by 1d10 + their proficiency bonus, or grant her a +4 to a saving throw.

Doll. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d4+6) bludgeoning damage.

Forced Protection (2/Day).  Aeseth can force a creature she can see within 5 feet of herself to make a Wisdom saving throw.  The DC is the spell save DC of her supplicant.  On a failure, the creature must use their reaction to protect Aeseth as described in her Protect the Greater feature, unless that creature is attacking her, or forcing her to roll a saving throw.