Pseudo

Origins
The Grue are a species of shapeshifters who are bent on conquering the galaxy in the name of their psychic regime. When they attacked earth in the 70s, they were fought off by the Freedom League. One member remained on earth.

Now outside the range of the psychic's control, the alien was overwhelmed with guilt for their actions and turned themselves into the earth authorities. Seeing their willingness to atone, the Freedom League allowed them to join and work to protect the planet they were forced to attack

Powers
Pseudo is a shapeshifter, able to take on any biological form at will. This is a casual thing for their species, and they often do it instinctively if not actively suppressing it (they don't see themselves as having a "true" form). They are also mildly telepathic, allowing them to speak any language into people's minds.

As an alien, they know a lot of advanced science and are aware of the current state of galactic politics. They're also immune to a lot of the issues that affect humans with their different biochemistry. They don't appear to have aged since the 70s, although what that means for a shapeshifter is unclear at best.

Current Activites
As the freedom leauges expert in alien interactions, they've been spending a lot of time dealing with the aftereffects of the collapse of the Lor Republic (what do you mean you didn't hear about the collapse of the Lor Republic? Wow, don't you get Direct Quantum Interplanetary Information Transferral on this planet?). Alien refugees who find themselves on earth are usually assigned to Pseudo to familiarise them with their new homes.

Otherwise, they enjoy hanging out with humans. While Rick Fox (a black man) is their main human identity, they enjoy taking on other forms to explore humanity from different angles. They're interested in human privalige and oppression politics, and have recently set up a blog about it. It's popular, if confusing for people who don't realise its written by a shapeshifting alien.

Relationship
Psuedo is reasonably popular amoung heroes, but very popular amoung the aliens on earth. They know most of the aliens, both open and hidden, in freedom city and regularly hang out with them to talk about the weird humans. They can easily get information or help from the alien community if needed, although they prefer not to exploit them toomuch

Their archenemy is the Metamind, Psychic Emperor of the Grue. A distant enemy, but Pseudo still hopes to one day free their species from their tyranny, and the Metamind still sends agents to recapture their "lost" soldier.