Kyon

Kyon is a silver key Celestial Spirit who is owned by Tamaki. Kyon possesses Preservation Magic, and it is why it possesses the name 'Gate of the Reflector'. Kyon's body is similar to a Lacrima, as it can absorb magic, and use it later on. Kyon has another ability to where he can expand his body into different forms. It can have a humanoid form, different animal forms, expand, shrink, etc.

Appearance
Kyon takes the form of a regular black sphere when summoned. Then it begins to show a pupil-like shape in a random place on it's body. The pupil is usually shown about halfway, and each part of it has a different shade of blue or green. When it expands it's body into a different form, there's many different appearances Kyon can have.