Swans

Swans (白鳥, Shiratori) are a simple summon to acquire provided that you are able to contact a sentient swan. Considering their interactions with humans, this isn't difficult to achieve. Their base of operations appears to be close to Kirigakure, though where is unknown.

Overview
Swans are normal-sized birds and are used for a wide variety of purposes depending on what the specific swan has trained in. Some are used purely for their appeal, while some train extensively in among other combat forms. Larger swans exist, though they regularly exercise the to appear smaller than they actually are. It is unknown if Swans include in their teachings.

Known Swans

 * Kokuchō
 * Shirabane

Known Summoners

 * Contract::Yoshihira