Yūkimaru

is a young boy (it is still unknown if he is a shinobi) who appears in the second Naruto Shippūden filler arc. He seems to be another test subject of Orochimaru.

Hunt for the Three-Tails Arc
So far we have only seen him once in this arc, collecting tree flowers after Sasuke Uchiha cut them off with his Chidori for his training. Sasuke tells Yuukimaru to go home and he replies he has no home to go to.

Trivia

 * Based off appearance, Yūkimaru looks very similar to the Three-Tailed Beast's former Jinchūriki, who was revealed in splash page of chapter 420.
 * Another similarity with to the Three-Tailed Beasts Jinchūriki is their connection to flowers. In the splash page, the Jinchūriki carries a weapon with a flower attached to it, while Yūkimaru first appearance is picking cut flowers.
 * Based off appearance, Yūkimaru looks very similar to the filler Character Menma.