
Glass Immortals · Character
Idrian Sepulki
Also known as Breacher Sepulki, Captain Sepulki
- Major
- First seen · Book 1
Idrian Sepulki is a major character in Glass Immortals (Book 1).
- Gender
- male
- First appears
- Book 1
- Books
- 1
Description
A very tall, broad-shouldered man with coal-dark skin and a powerful frame, including legs strong as tree trunks. His short black hair has gray at the temples as he ages; his right eye is a purple witglass prosthetic, and a chunk is missing from one ear. He wears interlocking-steel breacher halfplate with dark blue hammerglass, yellow forgeglass, milkglass, and purple witglass, and a helmet with tightly curled hammerglass ram’s horns. Permanent purple and yellow glassrot marks appear on his cheeks, neck, left arm, hips, and calves.
Connections
Family & partnersFriends & mentorsRivals
- CJ
Colonel JorfaxPartner
Tadeas believes Jorfax has a romantic interest in Idrian.

Demir GrappoProfessional
Demir commands Idrian in the campaign and brings him along to guard against an enemy breacher. He also deliberately shows Idrian the attack to restore his confidence in Demir’s leadership.

Thessa Foleerold friend
They have known each other for years through Kastora and reconnect at the army camp. Idrian answers Thessa’s questions about Holikan with compassion and candor.
- BH
Braileer HoldestProfessional
Idrian is Braileer’s captain and depends on him as his armorer. He carries the badly injured young soldier to medical care and sacrifices a year of service to secure treatment that might save him.
- F
Fennycomrade
Fenny serves in Idrian’s battalion. He comforts her when Squeaks is trapped and takes charge of the rescue.
- GS
General Stavricommanding general
Stavri commands the campaign in which Idrian serves. His withdrawal orders threaten Idrian’s chance to retrieve the cinderite, though Idrian proceeds with his mission.
- MK
Master KastoraFriend
Idrian calls Kastora his friend and is deeply concerned for him. He joins Demir on a dangerous rescue attempt and stays with Kastora at his deathbed.
- M
MikaProfessional
Mika accompanies Idrian’s search team and supplies the grenades used against the flying glassdancer. They cooperate in the field, though her bluntness sometimes clashes with Jorfax.
- S
SqueaksProfessional
Squeaks serves alongside Idrian and is injured by the creature that attacks the engineers; Idrian reports the injury while bringing Braileer to the medical tents.

Tadeas GrappoProfessional
Idrian serves in the military campaign under General Grappo’s command; the medical authorities note that even Grappo cannot override the restrictions on high-resonance cureglass.
- TK
Tirana Kirkovikacquaintance
Idrian recognizes Tirana as the Hyacinth Hotel’s attractive master-at-arms and remarks that she is too young for him.
- V
Valientcomrade
Valient coordinates troops with Idrian and Tadeas, carries out Idrian’s battlefield plan, and praises Idrian’s dangerous intervention.
- MF
Myria Forlprotector
Demir places Myria under Idrian’s protection after Holikan surrenders; Idrian ensures she remains safe during the sack.
- SS
Sammi Stavrimilitary superior
Sammi is a senior political authority over the Foreign Legion. Idrian curses her leadership after the defeat and the destruction of the Legion’s senior command.
- DK
Devia Keriteopposing commander
Kerite commands the Drakes advancing against Idrian and Tadeas’s position, making her their military adversary.
- Y
Yuglidcombatant
Idrian attacks the glassdancer assassin on the fort roof, discovering that the enemy is a nonhuman creature. The creature withstands his assault, injures him, and escapes by flying away.
Story so far
BOOK 1In the Shadow of Lightning
Key events
- Book 1
Ch. 8Discovery of Phoenix Channel PrototypeMaster Kastora reveals to Demir and Idrian that he and Adriana created a phoenix channel prototype capable of recharging godglass, before dying from his wounds. - Book 1
Ch. 22Idrian's Retrieval of CinderiteIdrian infiltrates the Grent ducal palace alone, retrieves cinderite from the undercroft, and escapes via chimney after setting fire with grenades. - Book 1
Ch. 39Demir's Victory at Fort AlamedaDemir uses strategic deception including a man-made lake flood and night cavalry attack to defeat Kerite's forces threatening Harbortown. - Book 1
Ch. 55Thessa's Forgiveness of DemirThessa learns the truth about Demir's role in the Holikan campaign from Idrian and forgives him, reaffirming their business partnership despite the painful history.
Gallery
Book 1: In the Shadow of Lightning
Appearances
Next stop
In Book 1
Places
Meet Idrian Sepulki in Bookworm
Meet Idrian Sepulki in your EPUB — spoiler-safe to the book you're on.





