Eos's innate spellcasting ability is Charisma but shares your spell save DC and spell attack bonus. It can innately cast the following spells, requiring no material components
Unarmed. Melee Weapon Attack: your spell attack modifier to hit, Reach 5ft., one target. Hit: 1 bludgeoning damage
Fey Bolt. Ranged Magical Attack: your spell attack modifier to hit, Reach 30ft., one target. Hit: 8 (1d4+3+PB) radiant damage.
Fey Shield (Recharge 6). Eos creates a shield of temporary hit points around a target creature within 60ft. of them. This shield is 1d4 + your spellcasting ability modifier. The shield lasts for one minute before fading.