Hiro's Yamikarasu came to visit
Hiro the day he returned from his injury but
Hiro slammed the window on it and shewed it away as it didn't recognize it.
That night, feeling a sudden sense of foreboding, Hiro and his friends go into the forest, where they find the Yamikarasu wounded and his secret base. Hanging around Yamikarasu's neck was a handmade badge that Hiro made and he started remembering his times with Yamikarasu.
Hiro,
Hiro's Eipam and
Hiro's Hinoarashi rescued it from a group of Nyarth that wanted the badge around its neck.