
Cradle · Character
Naru Cassias Arelius
Also known as Cassias Arelius
- Supporting
- First seen · Book 3 · Ch. 2
A graceful young man just past twenty with golden, tightly curled hair, dressed in finely tailored deep blue silk accented with silver embroidery. He carries himself with poise and pride, one hand resting on the hilt of his slender sword, his right forearm protected by a gleaming silver bracer that doubles as his Goldsign.
- Gender
- male
- Age
- young adult
- First appears
- Book 3 · Ch. 2
- Books
- 2 of 7 read
Naru Cassias Arelius begins as a poised, sword-wielding scion of the Arelius family in Blackflame, his silver bracer and tailored silk marking him as both warrior and noble. By Underlord, his disciplined elegance has deepened into a more formal, almost courtly bearing, reflecting the political weight he now carries after Eithan’s fall from the Patriarch’s seat. Across the series, Cassias transitions from a subordinate operative to a figure whose marriage into the Naru clan and shifting allegiance to Eithan illustrate the Arelius family’s fractured loyalties and the personal costs of sacred-art politics.
Description · as of Book 7
Cassias is a straight-backed young man with curling blond hair and striking blue eyes. He dresses in crisp, formal attire of dark blue fabric trimmed in silver rather than traditional sacred artist robes, projecting an air of disciplined elegance. A thin silver sword hangs at his hip, completing his refined, upright appearance.
Connections
Family & partnersFriends & mentorsRivals
- NJ
Naru Jingspouse
Cassias marries Naru Jing, forging a permanent personal and political bond between the Arelius and Naru clans that persists beyond Eithan’s fall.

Eithan Areliusformer subordinate
Cassias served as Eithan’s direct subordinate during Eithan’s tenure as Patriarch; after Eithan’s removal, their working relationship becomes strained yet still rooted in lingering loyalty.
Story so far
BOOK 3Blackflame
- Appears in Blackflame as a graceful, golden-curled swordsman whose silver bracer doubles as his Goldsign.
- Projects aristocratic pride while serving the Arelius family’s interests in the Blackflame Empire.
- Establishes his combat readiness and refined demeanor before the broader cast.
BOOK 6Underlord
- Reappears in Underlord with a more formal, dark-blue-and-silver wardrobe that signals his elevated status.
- Revealed as the spouse of Naru Jing, cementing an alliance between the Arelius and Naru clans.
- Publicly positioned as Eithan’s former subordinate after Eithan is removed as Patriarch.
- Navigates the political fallout of the Arelius family’s internal power shift.
Key events
Gallery
Book 3: Blackflame
Appearances
Meet Naru Cassias Arelius in Bookworm
Meet Naru Cassias Arelius in your EPUB — spoiler-safe to Book 7.
