Shirogane Saiga (才賀 しろがね)

Shirogane Saiga, real name Éléonore (エレオノール), is a young French woman who came to Japan to protect Masaru Saiga and repay the debt she feels from Shoji Saiga (Masaru's grandfather) for helping her family, a circus artist and the puppeteer of Harlequin.

Shirogane is a young pale-skinned woman with neck-length silver hair that has bangs swept to the left side, silver eyes, and a slender body with large breasts.

(Source: Karakuri Circus Wiki)