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Overview
The Sentinels are twelve semi-divine guardians created by Chronos, each bound to one of the twelve planets and its Chronotector. They are ageless and resistant to death. Injuries are temporary, and only severe damage or Void corruption can permanently destroy them. Each Sentinel has a specialized Chronotector ability, a reflection of the fundamental temporal power contained within the relic.
Twelve Sentinels should exist, but only six appear in Chrono Odyssey's current story. The fate of the remaining six is unknown. Given that eleven of twelve planets were destroyed by the Void, it is possible that some Sentinels were killed, corrupted, or simply lost when their worlds fell. Whether any of the missing six will appear in later content is an open question.
Known Sentinels
Velia -- Sentinel of Rodinia
Leader of the Sentinels. Velia's Chronotector ability is Time Stasis, the power to freeze everything in place. Time Stasis is absolute within its area of effect: nothing moves, nothing changes, nothing decays. The limitation is that Velia cannot reverse or alter events. She can only stop time, not rewind it. When things resume, they pick up exactly where they left off.
Velia used Time Stasis on her homeworld Rodinia before its complete destruction by the Void. Rodinia now exists as a frozen ruin, preserved in the exact moment before annihilation. The planet is visitable in-game, serving as a haunting reminder of what happens when the Void consumes a world.
In the prologue, Velia appears at the Ruins of Time with incomprehensible power, obliterating the Void forces threatening the player. She saves the sole surviving Vanguard member (the player), then sends them one year into the past with the message: "Find me there. Bring word that the future has changed." This act initiates the game's time-travel premise.
Leviona -- Sentinel of Izar
A researcher dedicated to studying the Void and anomalies like Labyrinths and Chrono Gates. Leviona's Chronotector ability is Time Mirage, the power to create multiple versions of herself within the same timeline. This allows her to be in several places at once, conduct parallel research, or fight from multiple angles simultaneously.
Leviona has a Void prosthetic limb, replacing a part of her body that was presumably lost or damaged. The prosthetic is made from Void-derived technology, suggesting that her homeworld Izar was technologically advanced before its destruction. Izar's civilization apparently understood Void energy well enough to incorporate it into functional prosthetics. Whether this makes Leviona partially Void-contaminated or simply a user of Void technology is unclear.
Betelgeuse -- Sentinel of Magellan
The primary antagonist of Chrono Odyssey. Betelgeuse was the former Emperor of Magellan, the planet that received the least Arche from Chronos. While other worlds prospered (especially Setera, which received the most Arche), Magellan suffered from famine and desolation. Betelgeuse awakened the Void by using his Chronotector's Temporal Tuning ability at a cosmic scale, manipulating past, present, and future to break the Temporal Rift seal.
His decision destroyed eleven of twelve worlds, including Magellan itself. Whether he intended this outcome or lost control of the Void after releasing it is one of the central mysteries of the narrative. The fact that he was an Emperor, not just a guardian, adds a political dimension to his actions. He may have acted out of duty to his starving people rather than personal ambition.
Petra -- Spirit Warden
Sentinel of an unnamed world. Petra is typically calm and gentle, but she becomes intensely passionate about specters and death. After the Void destroyed her homeworld, she harnessed her Chronotector to raise an army of Specters from fallen warriors. Her ability is Summon Specter, and unlike the player (who can summon one Specter at a time), Petra can summon multiple powerful Specters simultaneously.
In the story, Petra teaches the player how to summon and command their own Specters through the Chronotector. She is the reason the player can use the Summon ability at all. Her obsession with raising the dead walks an uncomfortable line between reverence and something darker, though the narrative frames her as an ally.
The missing six
With twelve planets and twelve Sentinels created by Chronos, but only six Sentinels appearing in the current story, the absence of the other six is conspicuous. Several possibilities exist:
They were killed when their worlds were consumed by the Void
They were corrupted by the Void, potentially becoming enemies
They are in hiding or sealed away, waiting to be discovered
They abandoned their posts before or during the Void crisis
Their stories are reserved for future content updates
The game has not confirmed any of these explanations. The mystery of the missing Sentinels is likely an intentional narrative thread.
The player as Sentinel
The player character is the sole survivor of a Vanguard assault on the Ruins of Time. After acquiring Setera's Chronotector and being sent back in time by Velia, the player ascends to Sentinel rank. Unlike the established Sentinels who each specialize in a single Chronotector ability, the player has access to all five: Temporal Tuning, Temporal Isolation, Time Reversal, Temporal Resistance, and Summon.
This generalist access is unusual. The other Sentinels developed their single specialty over what appears to be centuries or millennia. Whether the player's broad access represents a difference in Setera's Chronotector, Velia's intervention, or simply a gameplay concession is not explained in the current story.