Mechanoid 2150

 was a Mechanoid scientist.

When the Daleks, led by the Emperor of the Restoration, landed in Mechanoid City, Mechanoid 2150 agreed to speak to the Dalek Prime Strategist. They travelled across the City to inspect the status of the orbital defence grid, discussing the concept of beauty in Mechanoid and Dalek cultures on their way. Once they reached the control room, the scientist noticed that the orbital array had sustained minor damage from the Daleks' arrival. As the Prime Strategist commanded to repair it immediately, Mechanoid 2150 noticed that something was draining energy from the defence grid. Despite the efforts of them and the Strategist, the energy was drained completely, leaving the Mechanoids defenseless. (WC: Planet of the Mechanoids) Using the remains of the orbital array, 2150 and the Prime Strategist sent the Entity back to its own dimension. (WC: The Deadly Ally)

2150 accompanied the Mechanoid forces led by the Queen to attack the Dalek City on Skaro. There, the Emperor revealed the Daleks weren't as weak as the Mechanoids had been led to believe and unleashed an army against them. In the ensuing battle, 2150 and the Queen found the Strategist and tried to convince him to turn on the Emperor. He pretended to agree and 2150 accompanied him to another chamber where they planned to use the City's beam projector to open a portal to the Entity's dimension and pull the Emperor through. At the last moment, however, the Strategist betrayed the Mechanoids and modified the beam to pull them through the portal instead, including 2150. (WC: Day of Reckoning)

Behind the scenes
Mechanoid 2150's designation is a reference to the film Daleks' Invasion EArth 2150 A.D.. Their appearance is inspired by Menoid from TV Century 21's Dalek comic series.