Yes. Equipping the event CE Kaleid Ruby or Sapphire will give an additional 50% (100% MLB) bonus damage to all female servants, plus Astolfo and d'Eon. During the World End Matches (Raid Quests), they will also provide a respective 50% Buster or Arts buff. I recommend limit breaking them as soon as possible.

For bonus servants, Illya, Kuro, and Mash have a 100% bonus damage throughout the event, while Medb, Helena, Medea Lily, and Nursery Rhyme receive a 50% bonus damage.