What is the name of the character depicted in the picture?

Toothless is Hiccup's Night Fury and one of the two main protagonists of the "How to Train Your Dragon" franchise.

"How to Train Your Dragon" is a 2010 American computer-animated action fantasy film loosely based on the 2003 book of the same name by Cressida Cowell, produced by DreamWorks Animation and distributed by Paramount Pictures.

The story takes place in a mythical Viking world where a young Viking teenager named Hiccup aspires to follow his tribe's tradition of becoming a dragon slayer. After finally capturing his first dragon, a Night Fury, and with his chance at last of gaining the tribe's acceptance, he finds that he no longer wants to kill the dragon and instead befriends it, even calling him Toothless.

Toothless possesses two sets of wings (one main pair and one smaller pair near the base of his tail). The first pair allows him to do a vertical take-off. Behind that is a set of smaller wings that aid in his gliding. Toothless' eyes are bright green, sometimes acid or emerald-green.

Toothless is the most intelligent of all known dragons, and seems to have a dry sense of humor, similar to that of Hiccup. He doesn't take kindly to being offended, and is very protective of his human friend. He is usually quite playful and even a little teasing when not threatened.