Dr Metropolis

Origin
The entity calling itself "Dr Metropolis" appeared after the invasion of the underworld in 1960. Casually repairing the damage the attack had caused, they claimed to be the local god/spirit/incarnation of Freedom City. Shocked into awakening by the devastation, they'd stayed to protect themselves from those who would hurt them, and became a founding member of the freedom league.

How much of this is true is unclear at best, but they have been dedicated to protecting the city ever since, and to the freedom league that's enough to vouch for the entity's loyalty.

Powers
Dr Metropolis controls the city. They can see anywhere in there, travel anywhere in there and control the physical makeup of the city in a number of ways, from throwing walls to controlling cars. These powers affect other cities, but they prefer not to use them there, to "avoid angering those city spirits" Physically, they're made of bits of the city, and thus have no biological needs. They seem to be immortal, coming back from any damage as long as the city stands.

Their power ebbs and flows based on the city's status. In the past, they've been caused severe pain when the city has fallen into riot or suffered huge damage, and they've hinted the destruction of the city would destroy them. They cannot leave a city, and start falling apart in wilderness environments.

Current Activities
Metropolis spends most of their time helping the city directly (usually also helping the people in it, luckily). Their quick rebuilding of places damaged in battle is the only reason the freedom league hasn't been sued or insurance premiumed into oblivion, a vitally important if uninteresting role

Metropolis has taken it upon themselves to create the Freedom Leauge charter, which in its unabridged state now runs to nearly 150 pages (most members use the abridged copy). Recently, they've started taking up art, in the form of strange and elaborate buildings dotted around the city.

They are not a real doctor.

Relationships
Metroplis sees most humans as fairly interchangeable- they respect their teammates but don't really see them as friends. They hint at having friends and enemies amidst cities (they don't like emerald city), but this is hard to tell for humans

The only being they have expressed as an archenemy is The Green Man, a powerful fairy lord of the forests dedicated to destroying all technology and human process