Yui and Chloe's Books.

They use no physical weapons, mainly spells and books. Although they have extremely durable skin, able to stand up to many substances and objects. Using the spell books would give the magic used about 45% more power.

Yui's Book- Ryo

This spell book is manifested from her soul, so it can appear and disappear at will. It is indestructible because of that, and can used as a medium for her chakra. The book can speak, so it can cast spells from itself. Although, Yui can still cast spells if she wants. The book isn't needed to use elements, and some binding magic, but is recommended for more powerful incantations and magic. Things can be bound to the book given the right conditions.

Yui's Book- Kyo

This spell book is manifested from her soul, so it can appear and disappear at will. It is indestructible because of that, and can used as a medium for her chakra. The book can speak, so it can cast spells from itself. Although, Chloe can still cast spells if she wants. The book isn't needed to use elements, and some consuming magic, but is recommended for more powerful incantations and magic. Things can be drained into the book and sealed given the right conditions.

Yui and Chloe's Umbrella- Roy

Despite being only an umbrella, They can easily fly in the air with it, as well as levitate. Beams can be shot from the tip of the head, and the mouth on the pumpkinhead can bit, hard. Spikes can rain from the inside of the umbrella, and it can consume energy as well as use binding energy.