Todder is a recurring character appearing in the first, third and fifth seasons. Originally played by an unidentified extra, Will O'Connell took over the role in the third season, though he was finally identified in the fifth. Todder, nicknamed Toad, is a Builder of the Night's Watch.
Todder accompanies Jon Snow on his expedition to Hardhome. During the battle that ensues after the arrival of the Night's King, he attempts to dissuade Jon from staying behind to fight off the White Walkers, but Jon orders him to keep transporting Wildings to the ships. After the Night's King summons a new host of Wights, Toad pulls back to shore to allow Jon, Edd, Tormund and the last few fighters to jump aboard and escape the oncoming hoard and row away.
In the A Song of Ice and Fire novels, Todder is the son of a winesink owner. He is described as a short, ugly boy with an unpleasant voice. He has pig eyes, small and shiny. Instead of a Builder, Toad is made a Ranger. He's part of the group of friends that prevent Jon Snow from abandoning the Night's Watch when the latter flees to join Robb Stark on his march south to wage war against the Iron Throne.