Plank

Plank is a merman in episodes 22 of Season 1 from the show Sofia the First. Plank is voiced by Phil Morris.

Biography
Plank is the senior advisor to queen Emmaline.

He first appears along with Queen Emmaline after Sofia follows Oona and Cora home. When Oona and Emmaline have a dispute about the Floating Palace's presence in the cove, He sides with Emmaline prompting Sofia to swim forward and side with Oona, revealing herself. Emmaline and Plank both tell Cora, Oona, and Sofia about how he got the scar on his arm. Sofia tries to assure the pair that the humans on the ship mean no harm but they don't take her seriously both because they can tell she's a child and because they think she's a mermaid. He urges Queen Emmaline to use her trident to conjure a storm to move the ship out of the cove but Emmaline, Sven, Sofia, and Oona, are all against the plan because that might sink the ship. Sofia proposes a more peaceful solution: She'll go up and convince them to move the ship. When Plank and Emmaline both ask her how she would do that, Sofia reveals that she's really a human and that the ship belongs to her family. Plank instantly starts acting negatively toward her prompting Oona to swim forward and angrily silence him. Emmaline commands Sofia to do that and never come back.

When Sofia comes back and tells the colony about Oona's abduction by a sea monster, he refuses to believe her because of his hatred of humans and accuses her family of taking Oona captive and sending "the girl back to lie to us." Emmaline gives her until sundown to return her daughter or she'll sink the Floating Palace. Plank follows Sofia to keep an eye on her and sees her go up to her ship but is surprised when she comes back without Oona and wonders where she's going. When time's up, Emmaline uses her trident to conjure a storm to sink the ship.

Sven, who had gone with Sofia and saw the monster with his own eyes, stops her before the storm gets too fierce and leads her and Plank to Oona, who tells them they have Sofia to thank for the fact she's safe and Cora tells Plank off. Emmaline uses her trident to stop the storm. Plank abandons his hatred for humans and becomes friends with Sofia's family.