Happy is one of the seven dwarves that befriends Snow White, following the death of Stealthy. Happy, along with the other dwarves, stand by Snow White as she faces her stepmother, the tyrannical Queen Regina, who eventually casts the first Dark Curse, consuming everyone in the Enchanted Forest.
Happy, along with everyone else taken by the curse, is transported to Storybrooke with no memories of the Enchanted Forest. However, Snow White and Prince David's daughter, Emma Swan, breaks the Dark Curse with true love's kiss, therefore bringing back everyone's memories of their true selves.
While Snow, Emma, David, Regina and the other heroes are away in Neverland rescuing Henry from Peter Pan's clutches, Happy confesses that he is glad they are gone because there is a lack of problems in Storybrooke without them. They eventually return, unwittingly bringing Pan with them, who casts a second Dark Curse which sends everyone back to the Enchanted Forest. However, with the threat of the Wicked Witch of the West, Snow White casts a third Dark Curse that takes them all to Storybrooke once more.
Happy goes with Leroy and Granny to confront Snow after Elsa causes a power outage across town, since Snow cast the latest curse and is therefore made the mayor. Happy and the other dwarves fall victim to the Spell of Shattered Sight, until it is broken.
Happy, Leroy and Doc go with Snow, David and Regina back to the Enchanted Forest in order to find Emma, who has become the new Dark One. However, six weeks after arriving in Camelot, they find themselves back in Storybrooke without their memories of their time in Camelot. After the fourth Dark Curse, cast by Hook - who is also a Dark One, is broken, Hook summons all the other Dark Ones from the Underworld. Several Dark Ones brand Happy and the other dwarves with the Mark of Charon, although the Dark Ones' plans are foiled when Emma and Hook are freed from the Dark One's curse.
- Other dwarves (brothers)
- Happy is one of the dwarves from the fairytale Snow White.
- Happy's pickaxe is usually the one used in attempts to destroy magical objects, coincidentally.
- S1, E01: "Pilot" (flashback)
- S1, E02: "The Thing You Love Most" (flashback)
- S1, E09: "True North" (flashback)
- S1, E10: "7:15 A.M." (flashback)
- S1, E14: "Dreamy"
- S1, E16: "Heart of Darkness" (flashback)
- S1, E19: "The Return"
- S1, E21: "An Apple Red as Blood"
- S1, E22: "A Land Without Magic" (flashback)
- S2, E01: "Broken"
- S2, E02: "We Are Both"
- S2, E04: "The Crocodile"
- S2, E07: "Child of the Moon"
- S2, E09: "Queen of Hearts"
- S2, E10: "The Cricket Game"
- S2, E11: "The Outsider"
- S2, E13: "Tiny"
- S2, E19: "Lacey"
- S2, E22: "And Straight On 'Til Morning"
- S3, E02: "Lost Girl" (flashback)
- S3, E07: "Dark Hollow"
- S3, E10: "The New Neverland"
- S3, E11: "Going Home"
- S3, E12: "New York City Serenade" (flashback)
- S3, E19: "A Curious Thing" (flashback)
- S4, E02: "White Out"
- S4, E10: "Shattered Sight"
- S4, E21: "Operation Mongoose, Part One"
- S4, E22: "Operation Mongoose, Part Two"
- S5, E01: "The Dark Swan"
- S5, E02: "The Price"
- S5, E03: "Siege Perilous"
- S5, E08: "Birth" (flashback)
- S5, E10: "Broken Heart" (flashback)
- S5, E11: "Swan Song"
- S5, E12: "Souls of the Departed" (flashback)