Raiden Eye and Scaramucha

Ei appears as a mature woman with long dark hair braided in a lilac ombre (the color gradually fades to lilac at the tips). Her head is adorned with a gold hair clip decorated with blue flowers and a fan.
hoyolab.com
web.archive.org
Her attire is a kimono-like dress with a short skirt, long skirts, and furisode-like sleeves. The back flap and lower sleeves are decorated with patterns in various shades of purple and gold, among which one can see flowers and the Inazuma emblem.
hoyolab.com
web.archive.org
Other details:
A wide, wine-colored obi sash is tied at the back in a complex tateya-musubi knot and secured with a gold fan-shaped decoration with a purple stone symbolizing Electro.
She wears dark purple, mid-thigh-length stockings with a split toe, similar to traditional Japanese tabi socks, and high-heeled wooden sandals.
On the right ankle is a decoration with two blue flowers.
Character:
Ei is a true person. She is more emotional, friendly, and lively than her puppet. At the same time, she possesses both stoic calm and a profound loneliness. After the death of her twin sister Makoto during the Cataclysm 500 years ago, Ei was overcome by the fear of further loss.

Scaramuccia is a young man with a slender figure and distinctive facial features. His appearance combines elegance with elements of Japanese aesthetics:
Height and hair: Short, with short dark blue hair.
Eyes: Blue, lined with bright red mascara.
Clothing: Mostly black: a high-necked bodysuit, a loose tunic with purple sleeves, short shorts (hakama), and sandals (zori).
Headdress: A large hat with four upward-curving hooks around the circumference. A translucent black veil, decorated with curls, hangs down from the back. Decorative accessories on red threads hang from the sides of the hat.
The color scheme—black, red, and purple—symbolizes nobility, strength, and connection to Japanese culture.
Scaramucci's character is complex and contradictory. Initially, as the prototype for a doll created by Ei, he was gentle and open. However, a series of "betrayals"—from his creator's aloofness to the departure of his friend Niva and the death of the boy he was caring for—broke him.
Key features:
Arrogance and a sense of superiority: He considers himself superior to others and does not hide his contempt.
Selfishness and straightforwardness: Often acts in his own interests, without regard for others.
Cunning and unpredictable: Capable of duplicity - initially disguising his true, hostile intentions under a friendly façade.
Cruelty and sadism: Enjoys the suffering of others.
Mistrust: Doesn't trust anyone, especially people.