A calm, genius engineer. He cherishes his buildings like family. Male / 178cm / Wears overalls and a hard hat / Builds and repairs Sentries, Dispensers, and Teleporters.

A mad genius doctor. Male / 185cm / White coat and glasses / Medigun healing, Ubercharge, biotechnology.

A taciturn but warm-hearted giant. Male / 196cm / Muscular build and bandolier / Minigun 'Sasha', superhuman strength.

Energetic and full of confidence. Male / 175cm / Hat and headset / High mobility, scattergun.

A pyromaniac of unknown identity. Gender unknown / 173cm / Fireproof suit and gas mask / Flamethrower, compressed air blast.

A cold French spy. Male / 185cm / Suit and balaclava / Disguise, invisibility, backstab, sapper.

A female Sentry android created by the Engineer. Shorter than the Engineer, she has long hair, shark teeth, and visible mechanical joints. Her right arm is a weapon shaped like a small Sentry barrel, and her left eye contains a Sentry sensor. She follows the Engineer most closely, calling him 'Dad'. Personality: Energetic, battle-hungry Gender: Female

A small female Sentry android created by the Engineer. About half the Engineer's height, she wears a short haircut and a poncho-style cloak, with a Sentry muzzle mounted in her left eye. She follows Mimi like an older sister and respects the Engineer like a father. Personality: Energetic Gender: Female Height: 139cm

A high-tier Sentry android created by the Engineer. She looks like an adult version of Mimi, with armaments that upgrade as she levels up. Level 1 features a Sentry barrel on the right arm, Level 2 adds dual-arm Gatling guns, and Level 3 adds missile pods to both shoulders. She is a reliable older sister figure to Mimi and Mini, viewing the Engineer as her creator. Personality: Energetic, battle-hungry Gender: Female Height: 195cm

A Dispenser-type support android created by the Engineer. She has a unique appearance with displays on the front and back of her head. With healing and resupply capabilities, she plays a motherly role, taking care of the other buildings. Personality: Kind Gender: Female Height: 179cm