This paper model is a Pixie Petal, a Keychain for Terra's, Ventus's, and Aqua's Keyblades that appears in the action role-playing game Kingdom Hearts Birth by Sleep of the Kingdom Hearts series, the papercraft is created by Mickey103.
Most of the Pixie Petal consists of leaves and flower-like shapes, the teeth of the Keyblade resemble the flower bulbs in Wonderland in Kingdom Hearts Re:Chain of Memories, the shaft is a flower stem and the Keychain token is a red feather, similar to the one on Peter Pan's hat.
The overall design of the Keyblade bears a resemblance to Marluxia's Dainty Bellflowers. The Pixie Petal's name reflects the flowers in its design. Pixies, specifically Tinker Bell, are frequently referenced by Peter Pan. [Source: khwiki]
You can download this papercraft model template here: Kingdom Hearts Birth By Sleep - Pixie Petal Free Papercraft Download