Byr Ch’Kelrer at a glance
Byr Ch’Kelrer is a 3-star Science officer in Star Trek Fleet Command, added in Update 71 alongside the rest of the Symbiosis synergy group. He is a Neutral-faction officer built for one job: turning a long fight into a critical damage avalanche.
His bridge ability ramps up critical damage every time your ship gets hit by an armada, an Invading Entity, or a hostile. His below-decks ability pads your loot pile after non-armada hostile kills. He pairs cleanly with Masriad Vael, Dajash Tolra, and Toli to round out the Symbiosis crew used against PvE armada targets.
One quirk worth knowing up front: Byr has no captain’s maneuver. Putting him in the captain seat gives you nothing. The whole reason to recruit him is the officer ability and the below-decks slot. Plan your crews around that.
Star Trek background
Byr Ch’Kelrer is an Andorian scientist created for STFC, not for Star Trek canon. He does not appear in any series or film. The Andorian framing is what gives him his flavor: a blue-skinned, white-haired native of the icy moon Andoria, where the species was a founding member of the United Federation of Planets in 2161.
Canon Andorians lean militaristic, passionate, and famously suspicious. They serve in the Imperial Guard with honor and observe the Ushaan, a long-standing code of dueling. Byr is the exiled version of that culture: a brilliant inventor barred from the Andorian Institute of Science for what his peers called immoral and dangerous experiments. He now travels with Masriad Vael, working at the edges of the law and running his lab from her ship.
His role in STFC
Byr is a PvE damage amplifier. His officer ability rewards crews that take hits and stay in the fight, which means he shines on prolonged engagements rather than quick mining-defense skirmishes. Think armadas, Invading Entities, and tougher hostile grinds where the rounds stack up.
The below-decks side of his kit does a different job. Stinging Peer Review boosts base loot from non-armada hostiles, so he can also sit in a hostile-grinding crew as a passive multiplier when he is not on the bridge.
Captain ability: Chain of Command
This is the part most players need to read twice. Byr’s captain ability, Chain of Command, exists only as a label. The in-game description spells it out: “This Officer does not have a Captain’s Maneuver. Equipping this Officer as the captain of a ship provides no benefit.”
Do not run him as captain. There is nothing to scale, nothing to level, nothing to gain. The decision tree on his card has two real seats: bridge officer or below decks.
Officer ability: Excessive Measures
When the bridge slot triggers, things get interesting. Excessive Measures fires whenever your ship is hit by an armada, an Invading Entity, or a hostile, and it boosts critical damage for four rounds. The bonus scales with promotion rank.
Per-rank values, current as of the latest game data:
| Rank | Critical damage bonus (4 rounds) |
|---|---|
| 1 | 5% |
| 2 | 8% |
| 3 | 12% |
| 4 | 17% |
| 5 | 25% |
Two things to keep in mind. The trigger is taking a hit, so this is a reactive defensive buff rather than a flat opening boost. And ships with weapons that fire multiple shots only trigger Excessive Measures once per attack, so you do not get a stack on every shot in a salvo.
Below decks: Stinging Peer Review
Byr’s below-decks slot, Stinging Peer Review, raises base loot from non-armada hostiles by a flat percentage that grows with rank. It stacks with whatever other loot bonuses your crew already runs, and at top rank it is a sizable boost over the base haul.
Bring him below decks when you are grinding non-armada hostile waves and want a heavier drop pile per fight.
Where he shines
Three situations where Byr is doing real work:
- Symbiosis armada and Invading Entity crews, where his critical damage stack rides on top of the team’s existing extra shots and mitigation reduction effects.
- Long hostile fights against anything that hits back hard, where the four-round buff has time to mature and pay off.
- Hostile loot runs, where his below-decks ability raises the per-kill take from non-armada targets.
Where he is wasted: quick scout-killer crews, station defense, mining duty, and any captain seat.
The Symbiosis crew
Byr’s home crew is the full Symbiosis group: Masriad Vael as the Trill leader, Byr Ch’Kelrer, Dajash Tolra, and Toli. Each one carries a piece of the kit, and the crew is built for dismantling armadas and Invading Entities rather than for PvP.
The recommended layout is Byr on the bridge with Masriad Vael below decks. That stacks Byr’s critical damage with Masriad’s accumulating critical chance, and it sits on top of the synergy group’s existing extra shots and mitigation reduction effects. Completing Dajash Tolra’s synergy is what unlocks the bonus loot from armadas.
One acknowledged weak spot: the Symbiosis group leans hard into offense and does not bring mitigation of its own. A standard fix is to drop Tom Paris below decks to plug that gap if your roster supports it.
How to get Byr Ch’Kelrer
Byr is a recruitable officer added in Update 71. Like other STFC officers, he is collected through shards from event rewards, recruit token pulls, faction or special stores, and rotating in-game offers. Promotion all the way to rank 5 takes 588 shards total across the five tiers.
Event rotations change often, so check the current store and event lineup in your client to see exactly where his shards are surfacing this cycle. If he is not in the current rotation, he will come back, since Symbiosis is a permanent synergy group.
Frequently asked questions
Is Byr Ch’Kelrer worth ranking up?
If you run the Symbiosis crew for armadas or Invading Entities, yes. Rank 5 takes his critical damage bonus from 5% to 25% per trigger, which is the difference between a small nudge and a noticeable damage swing over a four-round window. If you do not have the rest of the Symbiosis crew yet, prioritize building toward that group before sinking shards into him.
Can I use Byr as a captain?
No. Chain of Command is a placeholder, and the in-game text says outright that he provides no benefit as a captain. Use him as a bridge officer or below decks.
What ship is Byr best on?
Anything you take into a sustained armada or Invading Entity fight where the rest of the Symbiosis crew is already plugged in. The ability is ship-agnostic, so the question is really about the engagement, not the hull.
Does Excessive Measures work in PvP?
The ability text covers armadas, Invading Entities, and hostiles. PvP targets are not called out, so do not plan a PvP crew around him.
Where do you get Byr Ch’Kelrer shards?
From whatever store, event, or offer is rotating his shards in the current cycle. The game’s store and events refresh often, so the practical answer is to open the in-game offers and event calendar and look.
Bottom line
Byr Ch’Kelrer is a specialist, not a generalist. He pays you back in hard PvE fights where the Symbiosis crew is doing its job. Outside of that, save the shards for someone who fits your priorities.