La principessa bibliofila

Reina Ueda

Elianna Bernstein (voice)

木村良平

Christopher Selkirk Ashelard (voice)

Kōki Uchiyama

Alexei Strasser (voice)

内田雄馬

Glen Eisenach (voice)

羽多野渉

Theodore Warren Ashelard (voice)

Unknown

Alan Ferrera (voice)

阿座上洋平

Irvin Olanza (voice)

Nobunaga Shimazaki

Alfred Bernstein (voice)

八代拓

Jean (voice)

Mikako Komatsu

Anna Hayden (voice)

前川涼子

Annie (voice)

千葉進歩

Baron Bernstein (voice)

Yukiko Aruga

Lady Wyler (voice) / Mars Company representative (voice) / Young lady (voice)

山下タイキ

Burglar (voice) / Man (voice) / Retainer (voice)

及川いぞう

Chancellor (voice) / Head archives worker (voice) / Village chief (voice)

島袋美由利

Christopher Selkirk Ashelard [young] (voice)

Satoshi Hino

Sieg Eisenach (voice)

花守ゆみり

Lilia Storeff (voice)

Tetsu Inada

Count Lowe Hayden (voice)

Fairouz Ai

Sophia (voice)

前田佳織里

Caroline (voice)

高尾奏音

Cecily (voice)

平ますみ

Lady Kreis (voice)

根本優奈

Matilda Dauner (voice) / Young lady (voice)

七瀬彩夏

Irene Palcas (voice)

今井文也

Conrad (voice)

Sonosuke Hattori

Archives worker (voice) / Guard (voice)

Tetsuro Noda

Chamberlain (voice)

植木慎英

Man at the party hall (voice) / Royal palace male servant (voice)

深川和征

Alexei's subordinate (voice) / Man (voice)

川井田夏海

Paolo (voice)

田中貴子

Rene (voice)

麦人

Dr. Nicola Letzi (voice)

Kikuko Inoue

Henrietta Ashelard (voice)

Ringo Yoshioka

Guard (voice)

藤澤奨

Guard (voice)

Takeru Yagi

Man (voice) / Shopkeeper (voice)

綾瀬みゆう

Child (voice) / Maid (voice)

安野希世乃

Sylvia Slade (voice)

れいみ

Nash Company representative (voice) / Young lady (voice)

植田千尋

Lady (voice) / Sinus Company representative (voice)

中根久美子

Selma (voice)

三村ゆうな

Rona (voice)

Aoi Yūki

Sharon Gardwin (voice)

嶋村侑

Elen (voice)

Michiko Neya

Agnes (voice)

近藤浩徳

Duke Palcas (voice)

家中宏

Earl Casull (voice)

水越健

Civil official (voice)

Kimika Imai

Young lady (voice)

小鹿なお

Young lady (voice)

Yohei Hamada

Retainer (voice)

大西弘祐

Man at the market (voice)

藤堂駿介

Man at the market (voice)

藤田大助

Man at the market (voice)

Hiroaki Yano

Man at the market (voice)

Tomokazu Sugita

Baron Maudslay (voice)

河村梨恵

Marissa (voice)

山根綺

Child (voice)

Urara Takai

Lady (voice)

小笠原仁

Man at the party hall (voice)

熊谷健太郎

Laennec Owain (voice)

伊藤雄貴

Shadow (voice)

Sara Kitano

Village girl (voice)

Tomoaki Maeno

Rei (voice)

中村光樹

Burglar (voice)

Yuuka Nakatsukasa

Lady Eisenach (voice)

須川晶紀

Lady Dauner (voice)

唯野あかり

Maid (voice)

鈴代紗弓

Sara (voice)

井之上潤

Archives worker (voice)

Hiroto Akiya

Archives worker (voice)

Mika Hiratsuka

Young lady (voice)

阿部菜摘子

Young lady (voice)

下鶴直幸

Official (voice)