Wriothesley is the 5-star Cryo Catalyst user in Genshin Impact who serves as the Duke of the Fortress of Meropide in Fontaine. He is a tall male character with pale skin, pale blue eyes, and black hair with grey streaks. Known for his muscular build, he has a prominent scar under his right eye and on his neck. His neck and arms are wrapped in black bandages, and he has a large wolf-shaped brooch on his coat. He uses the tall male model, featuring a strong, muscular physique suitable for a boxer. He is adorned with numerous silver stud/cuff earrings and rings on his fingers. Generally, he is calm, collected, and a bit of a "laid-back" leader. He is described as a man of principles who enjoys tea, but can also be intimidating, cheeky, and a grudge-holder.

Sigewinne is a 5-star Hydro bow-user in Genshin Impact, serving as the kind-hearted Melusine Head Nurse of the Fortress of Meropide. She adopts a largely human-like appearance to care for patients, wearing a, colorful, nursing-inspired outfit, while retaining signature Melusine features like blue ears, horns, and a fluffy tail. While she has a human-like complexion and hands, she retains signature Melusine traits: long, tall, pastel blue ears with frosted tips, a pair of small blue horns, and a round tail with a cross pattern. Her outfit is a bright-toned, childlike nurse's uniform, featuring a white apron over a turquoise puff-sleeved blouse, adorned with pink and blue bowties. She wears white tights with blue/pink decals and black moccasin-style shoes. She has pastel blue hair fading into purple with white highlights, styled into long, drooping twin tails, along with scarlet eyes. A large pink bow with a, Ousia-aligned Hydro Vision and small white decorative wings sits on her back