Who Tilly is in Star Trek Fleet Command
Tilly is an Uncommon, Engineering-class Federation officer in the Discovery Crew. She is the in-game version of Sylvia Tilly, the Discovery cadet turned engineer turned eventual Starfleet Akademie instructor. In STFC she sits in a defensive PvP niche: her captain seat punishes incoming player attacks, and her officer seat slowly chips away at the enemy’s officer Attack stat as your ship gets hit.
If you are new to her, the short version is this. Tilly is not a damage officer. She is a survival officer, valuable when other players are shooting at you and much less interesting against NPC hostiles. She fits naturally into a Discovery-flavored defensive crew and pairs well with other Discovery Offiziere whose abilities also reduce inbound pressure.
The rest of this guide covers her canon background, her abilities in plain language, the per-rank shard costs to promote her, where she actually earns a seat, and how to think about her synergies.
Star Trek background
Sylvia Tilly was born on Earth in 2233 and joined Starfleet as a cadet, eventually serving aboard the USS Discovery and being commissioned as an ensign. Her early Discovery years had her assigned to engineering under Paul Stamets, where she put a self-rated talent for theoretical engineering to work on the ship’s experimental spore drive program.
Tilly’s arc in the show is the underdog story. She wrestled with social anxiety, then with the question of whether she had any business pursuing command at all, and ended up doing both. She served as acting first officer under Captain Saru in season 3, and after Discovery’s jump to the 32nd century she left the ship to teach at Starfleet Academy. She went on to become the Academy’s longest-tenured instructor.
Sylvia Tilly was played by Mary Wiseman across the run of Star Trek: Discovery.
Her role in STFC
Tilly is a defensive PvP officer. Both of her abilities care about being attacked, and her captain seat is built specifically around defending from another player rather than from NPCs. That places her in a narrow but real bucket: ships that are likely to take hits from real opponents and that benefit from chipping away at the attacker’s effective damage over the course of a fight.
She is not a top pick for hostile grinding, mining defense against NPC drones, or armada work. If a crew has a slot left over for survivability against player aggression, particularly inside Discovery-themed builds, Tilly earns a look.
Tilly’s abilities
Captain ability: The Power of Math
When Tilly is the captain of a ship and that ship is defending against a player attack, she removes 10% of the opponent’s starting Shield Health at the start of combat. The bonus only fires when the other side initiates the fight and when the attacker is a player, not an NPC. Her captain ability does not present a clean per-rank progression that is safe to publish, so the value to treat as canonical is the rank-1 number of 10%, current as of the latest Daten.
Her captain seat does nothing on offense, nothing in PvE, and nothing while you are the attacker. Think of her as a tax on incoming raids rather than a general-purpose captain.
Officer ability: Hold Your Horses!
Every time the ship takes a weapon hit, Tilly has a chance to lower the opponent’s officer Attack by 15%. The 15% number does not change as she ranks up, but the trigger chance does. The chance values below are current as of the latest data:
| Rang | Trigger chance |
|---|---|
| 1 | 30% |
| 2 | 35% |
| 3 | 40% |
| 4 | 45% |
| 5 | 50% |
The reduction is cumulative, so in a longer fight she can compound her chip effect. Lowering officer Attack feeds into the opponent’s overall Damage output, so this is not a flat shield buff; it is a slow grind on the other ship’s hitting power.
Where Tilly shines
Three situations that line up with her kit:
- Defending a parked ship against expected player raids, where the captain seat’s 10% shield haircut catches the attacker on their first volley.
- Mid-game and later PvP fights where the engagement runs long enough for Hold Your Horses! to stack a few times and lower the opponent’s effective Damage.
- Discovery-themed crews where her officer seat sits beside other Discovery officers whose abilities also reduce incoming pressure. The pieces stack the same direction.
Outside those situations she is fine to leave on the bench. She is not a hostile killer, and she does not contribute to mining or economy crews.
How to get Tilly
Tilly is an Uncommon officer, so her shards mostly come from low-tier sources: standard recruit tokens, faction-store rotations, and Federation officer caches when they appear. Check current event and faction store availability in-game; specific drop locations shift with each patch and live ops calendar.
Total cost to take her from recruitment to rank 5 is 379 shards. The per-rank progression looks like this:
| Rang | Shards to reach this rank | Cumulative |
|---|---|---|
| 1 | 14 | 14 |
| 2 | 30 | 44 |
| 3 | 55 | 99 |
| 4 | 95 | 194 |
| 5 | 185 | 379 |
Because she is Uncommon, expect early ranks to come together fast and the rank-4 and rank-5 jumps to be the costs that actually sting.
Synergies
Tilly carries the Discovery Crew class-synergy bonuses. With her seated, the crew picks up an extra Command 10%, Engineering 5%, and Science 10% when the other seats match those classes. Engineering is the weakest of the three, so do not build the crew around stacking Engineering for her sake; the Command and Science bonuses are where the real value comes from when you pair her with other Discovery officers.
Inside the Discovery Crew the natural partners are the other officers whose abilities also reduce inbound damage or reshape an attacker’s offense, such as Michael Burnham, whose shield-reducing officer ability points the same direction as Tilly’s captain seat. Hugh Culber, Saru, and Stamets are also Discovery-group options worth trying around her. Keep crew advice conceptual here because the right pairing depends on the ship and the threat you are defending against. The point is that Tilly is built to slot into a Discovery defensive identity, not to anchor a crew of her own.
Frequently asked questions
Is Tilly any good?
She is a niche pick. Inside her niche, defensive PvP with a Discovery slant, she earns her seat. Outside of it she is one of many Uncommon officers and not a priority.
Where do you get Tilly shards?
Uncommon recruit pulls and rotating Federation or Discovery-themed stores are the usual paths. Check current event and faction store availability in your game; the rotation moves.
What ship is Tilly best on?
The honest answer is whichever ship you most expect to get attacked while parked, or whichever Discovery-themed defensive build you are running. She does not have a single canonical ship pairing; she has a captain-seat job and an officer-seat job.
Is Tilly worth ranking to five?
For a new or mid-game player, no, unless you are actively building a Discovery defensive crew and feel the higher trigger chance on her officer ability. For a player who already runs a Discovery-flavored PvP setup, the climb to rank 5 raises Hold Your Horses! from a 30% trigger to a 50% trigger, which is a real jump if you take many hits in a fight.
Does her captain ability work against NPCs?
No. The captain ability fires only when defending against a player attack. Against hostiles, armadas, and other NPC content, she does nothing in the captain seat.
Closing
Tilly is a specialist. If your station is being raided and you have the slot, she pays her keep. If you are looking for a general captain or an officer to bring to hostile farming, look elsewhere. Build her into a Discovery defensive crew and rank her up alongside the rest of the group, or leave her at a low rank and pick her up only when the PvP context calls for it.
