MA 2009Warning!
This page contains information regarding Star Trek: Short Treks, and thus may contain spoilers.

For the mirror universe counterpart, please see Sylvia Tilly (mirror).
"Did you ever think, when you signed up for Starfleet, that you'd be forced to see war and death?"
"Death found me when I was a child, so, yeah, I knew what I was getting into."
"I don't think I did, not really. Does that make me naïve?"
"It makes you optimistic.

Ensign Sylvia Tilly was a female Human Starfleet officer who lived during the mid-23rd century. She served aboard the USS Discovery in 2256.

When Tilly was nine, she worked out how to make her food synthesizer produce only spumoni ice cream by calculating the exact protein concentration and small particle dispersion of emulsifiers required. (ST: "Runaway")

She rated herself as the best theoretical engineer at Starfleet Academy, and was fast-tracked in order to serve aboard the Discovery. She initially had quarters of her own due to her "special needs", since she was allergic to polyester and viscoelastic polyurethane foam, which caused her to snore. She then started sharing quarters with Michael Burnham.

During her time aboard the Discovery, she served in engineering. She also was part of the boarding party sent to investigate the USS Glenn. (DIS: "Context Is for Kings")

Although often socially awkward, Tilly came out of her shell in certain settings, such as the party held on Discovery; even showing aptitude in 20th century beer pong. During the event, Tilly rebuked romantic advances from Lieutenant Rhys. (DIS: "Magic to Make the Sanest Man Go Mad") Paradoxically, Tilly also became a social mentor of sorts to Michael Burnham and facilitated her introduction to future romantic interest, Ash Tyler. (DIS: "Lethe")

In 2257, in recognition for her role in ending the Federation-Klingon War, Tilly was awarded the Starfleet Medal of Honor. She received her officer's commission as an Ensign and was placed on the command track. (DIS: "Will You Take My Hand?")

Memorable Quotes Edit

"What the heck… heck… hell? What the hell! Hold your horses!"

- Tilly, attempting to impersonate Captain 'Killy' (DIS: "Despite Yourself")

Appendices Edit

Appearances Edit

Background informationEdit

According to, Sylvia Tilly was born with laryngotracheal stenosis. This condition was described as "an abnormal narrowing of the central air passageways that can cause chronic snoring and a dry throat."

The character was named after the young niece of Gretchen J. Berg. (After Trek: "Episode 2")


Tilly appears in the "Age of Discovery" expansion to Star Trek Online, voiced by Mary Wiseman. In the tutorial for Discovery-era player characters, set shortly after the Battle of the Binary Stars, Tilly is a third-year cadet at the Academy whose engineering aptitude allowed her to be chosen as chief engineer for the cadet cruise aboard a Malachowski-class vessel. When the player character, a fourth-year cadet, unexpectedly becomes the captain, Tilly remains as chief engineer until the ship returns to Earth after rescuing the miners of Corvan II, after which she parts ways with the player just before her eventual assignment to the Discovery.

External linkEdit