Diane

Diane is one of the main characters in The Seven Deadly Sins (Nanatsu no Taizai) anime, known as the Serpent's Sin of Envy (with the serpent symbol tattooed on her left thigh). She's a member of the Giant Clan, making her enormously tall—around 30 feet (about 9 meters) in her natural form—towering over normal humans and even her fellow Sins.

In appearance, she's depicted as a beautiful young woman with purple eyes, medium-length brown hair usually styled in large twin tails (ponytails), and a curvaceous, well-endowed figure. Her typical outfit is a short orange bodysuit/leotard with boots that reach nearly to her knees, giving her a sporty and practical look for combat. (She can temporarily shrink to human size using special means, like a potion from Merlin, and wears simpler clothes like a pink dress in that form.)

Personality-wise, Diane is friendly, loyal, and gentle at heart, despite her massive size and immense physical strength. She's emotionally sensitive, hates feeling lonely, and can be jealous (fitting her sin)—especially toward anyone close to Meliodas, whom she has a big crush on early in the series, often reacting dramatically or possessively. She's brash and confident in battle, but also kind, protective of her friends, and surprisingly innocent or girlish at times (e.g., getting embarrassed easily or being scared of bugs). She dislikes unnecessary fighting, contrasting with many of her giant kin.

Her power is Creation, letting her manipulate earth and stone (creating golems, pillars, or reshaping terrain), and she wields a massive sacred treasure war hammer called Gideon.

Overall, she's a powerful yet heartfelt "gentle giant" type who grows a lot through her friendships in the group.