Yefu

"Hey! Guy! Whatcha doin' all the way out here in the snow? Ya part snowman?"

- Yefu

Yefu, self-dubbed Agent Yellow, is an Anouki living in Anouki Village in The Legend of Zelda: Spirit Tracks. He lives in the southwest house, has short horns and a mustache, and wears a yellow parka.

When Link first arrives in the village, Yefu is surprised to see a human out in the snow, asking if he is part snowman. Link asks him if he knows Steem, he thinks it over before simply coming up with it rhyming with "extreme" before suggesting Link go see the village honcho for a different type of answer. Once Link has agreed to help Honcho assign the Anoukis into pairs for guard duty, Yefu takes this to mean they will be forming "elite teams" and takes the code name "Agent Yellow." He also tells him that he wants a partner who can move freely, so they must not have large horns. He then quickly adds that he is not requesting that simply because of his own short horns. He ends up being paired with Honcho himself.

Once Link has paired up all the Anouki, Yefu says he is eager to start fighting monsters, telling Link his plan is to sneak up from behind and "drop the hammer" on them. Once Link has met Steem in the Snow Sanctuary and restored most of the Snow Realm's Spirit Tracks, he tells him about a train enthusiast named Ferrus to the east, who is quite knowledgeable on the Spirit Tracks. After this, he can be found performing guard duty while extremely bored with it. Once Honcho leaves, he asks if this means he can stop now.