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Cyrus (Sumeru)

Last updated 2026-05-25

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Add information from Cyno's Story Quest, Lupus Aureus Chapter: Act II - Oathkeeper.

Cyrus is an NPC exclusive to quests and events who first appears in The Mysterious Letter in Cyno's Story Quest, Lupus Aureus Chapter: Act II - Oathkeeper.

He is a retired Sumeru Akademiya professor and a former Sage of Spantamad.[2][3] Lisa and Cyno were his students, and Cyno in particular was raised as Cyrus' foster son.[1][3]

Profile

Change is the only constant.

Cyrus was a sage of great renown in Sumeru Akademiya, even having a quote on Bimarstan's Proverb Column, which contains quotes from the Akademiya's greatest scholars. As a professor, Cyrus had several students, including Lisa, Cyno, and Gafoor.[1][4]

Cyrus nearly died while exploring the Great Red Sand for research, but was saved by the Temple of Silence. Upon learning of Bamoun's plan to implant two Ba Fragments into children — Cyrus disagreed with his opinion. The two children, Cyno and Sethos, successfully resonated with the fragments, but when they began to show signs of instability, Bamoun had the fragments implanted in them before they dissipated for good.[5] Cyrus disagreed with this and subsequently left with Cyno, damaging the organization's plans.[1] He would later raise Cyno while attending to his studies and lectures.

Cyrus was present when Nefer arrived as a young girl at the Akademiya and was received by another scholar. Nefer was not allowed to take the entrance exam to determine which Darshans new students are eligible for, as was her right, simply for being one of the desert-folk as per policy by Grand Sage Azar. After Nefer was summarily assigned to Vahumana and left, Cyrus complained that she and the other desert-folk weren't being treated fairly.[6] By the time he was Sage of Spantamad, he would write a formal letter of protest that such students were not being given the education they deserved, but it was discarded into the collection of unclaimed mail kept in the House of Daena, which an older Nefer later discovered.[7]

When Lisa entered Sumeru Akademiya, he took a liking to her work early on and deemed her to be the greatest scholar the Akademiya had seen in 200 years.[8] He invited her to join several major projects, but most of them ultimately failed due to trying to attain "wisdom beyond mortal understanding" at great cost. Disillusioned by the "lunacy" of these projects, Lisa decided to leave the Akademiya after she graduated a mere two years later. Cyrus evidently sympathized with her decision and never tried persuading her to stay.[2]

In the manga, Lisa sent a letter to Cyrus at the Akademiya regarding an ancient language she could not decipher, found in a Fatui document pertaining to the god remains inside Collei.[9] Cyno was dispatched to Mondstadt in response,[10] and he successfully sealed the remains. Afterwards, he took Collei back to Sumeru and left her in Tighnari's care.

Following his retirement, Cyrus now resides in the Bimarstan area. His residence is seen in the Wondrous Times in Hangout Event: Kaveh: Act I - The Pendulum of Weal and Woe, where Zaha Hadi is found angrily accusing Cyrus of sabotaging her tomato plant for a competition between fellow retired professors.

Bamoun, desiring revenge against Cyrus for the damage he caused to the Temple of Silence, devised a plan with Sethos in order to lure him back and claim Cyno's fragment. They convinced a student, Urraca, to bring a damning letter to the Akademiya accusing Cyrus of fraud. The letter was also dotted with motifs of the desert, which he would recognize. As expected, Cyrus realized the intent behind the letter and set off to the desert alone, with Cyno chasing after him in the process. Cyno's friends — the Traveler, Paimon and Tighnari, went after Cyno and discovered the Temple of Silence, where they learned of Cyrus' past with the organization. Cyno, unwilling to let his foster guardian be harmed, offered to engage in a duel with Sethos for his safety, which he agreed to. Cyno and his friends ultimately won the duel, and Cyrus returned to the Akademiya afterwards, only to be scolded by Naphis for his recklessness.[5]

After catching up with his workload, Cyrus discovered several photos of him and Cyno when they were younger, which had been taken by Lisa. After some reminiscing, Cyno suggests paying a visit to Lisa, and he agrees to do so next week, only to remember about his gardening contest with Zaha Hadi and his desire to win.

Appearance

Quests and Events

Archon Quests

Story Quests

Hangout Events

Events

Character Mentions

Character Stories

CharacterStories

Character Voice-Overs

CharacterVoice-Overs

Mails

SenderMails
  • ??? (Birthday Mail)

Trivia

Faranak's drawing; Cyrus appeared as the rightmost figure

Faranak's drawing; Cyrus appeared as the rightmost figure

  • During Wondrous Times in Hangout Event: Kaveh: Act I - The Pendulum of Weal and Woe, Kaveh and the Traveler find Faranak's drawing of her husband with three other male acquaintances, two of whom are heavily implied to be Tighnari's and Alhaitham's fathers. Cyrus is the rightmost man, given several context clues:
    • The man wears an Akademiya uniform that shows off his association with the Spantamad Darshan, the same Darshan Cyrus mentored for.
    • Earlier in the quest, Tighnari explains that Cyrus is Cyno's adoptive father, while Faranak's notes about the drawing notes that there were three couples present at the gathering and one single man. The three couples would be Tighnari, Kaveh, and Alhaitham's parents, while Cyno was adopted by Cyrus and thus, Cyrus does not necessarily have a wife.
    • Based on the above, the authorial intent is that Tighnari, Kaveh, Alhaitham, and Cyno are the "next generation" of their parents' friend group, even if by coincidence. This is reinforced by the quest's ending illustration, Leisurely Gathering, which depicts the four sitting in the same order as their fathers did in Faranak's drawing.

Etymology

Gallery

Quest Stills

Other Languages

LanguageOfficial Name
EnglishCyrus
Chinese
(Simplified)
居勒什
Jūlèshí
Chinese
(Traditional)
居勒什
Jūlèshí
Japaneseジュライセン
Juraisen
Korean키루스
Kiruseu
SpanishCiro
FrenchCyrus
RussianСайрус
Sayrus
ThaiCyrus
VietnameseCyrus
GermanCyrus
IndonesianCyrus
PortugueseCyrus
TurkishCyrus
ItalianCyrus

Change History

Introduced in Version 1.0 • Released in Version 4.6
Version 4.6

Version 3.7


Version 1.0

  • Cyrus (Sumeru) was mentioned.

References

  1. 1.0 1.1 1.2 1.3 Event Windblume's Breath Quest, Windblume Festival: Part II, Part 2: A Riddle Amidst the Crowds
    Cyno: Instead, he gave me the tools I needed to lead the life I have today. He adopted me, educated me, taught me how to fit into society... I am very grateful to him.
  2. 2.0 2.1 Event Second Blooming World Quest: A Librarian's Long and Carefree Vacation
  3. 3.0 3.1 Hangout Event, Hangout Event: Kaveh, Act I - The Pendulum of Weal and Woe: Wondrous Times
  4. Event Second Blooming NPC Dialogue: Lisa - The Akademiya
  5. 5.0 5.1 Story Quest Act, Cyno, Lupus Aureus Chapter: Act II: Oathkeeper
  6. Nefer's Character Story: Character Story 1
  7. Archon Quest, Song of the Welkin Moon, Act IV - An Elegy for Faded Moonlight, Part 2: Dance of Death: Serpent and Scorpion
  8. Lisa's Character Story: Character Story 2
  9. Manga, Chapter 8: Final Clue (Part 2)
  10. Manga, Chapter 12: Unshrouded Resolution (Part 2)