Douglas, presumably male, unknown race, unknown age.
Douglas GENERAL

Commander of the Galactic Federation's Frontier Space Force. One of the people who were greatly involved in the founding of the Galactic Federation, and is known as a famous general.
The end of the First Galactic Integration War and the suppression of the E-RO pandemic incident that started in the Gos system. And he is currently working to end the Second Galactic Integration War, which takes place all over the galaxy... mainly in remote areas outside the center of the galaxy.
He is not only a great general, but also an excellent warrior, and occasionally goes out on his own to destroy his enemies using his energy saber and psychic powers. His overwhelming combat prowess has earned him the trust of his subordinates, or perhaps it's the flip side of his fear.
However, his personal life and origins are completely unknown.
Because he always wears an armored environmental suit for combat, his true face is unknown, and he works to the point where his personal life is basically nonexistent, making him uncanny and too tough for his environment suit. There are many mysteries about him.
One thing that is known about him is that he enjoys playing the piano.

What did he do during the Gos E-RO Pandemic?
He fused with intelligent life, and against the E-RO, which continued to proliferate, he sealed off the space around the Gos system, incinerating and eradicating a large area of the E-RO and then he went to the E-RO's home planet alone, and contacted the source of the E-RO's outbreak, called Mother E-RO, and after negotiations, he was told that he was going to be sent to another star system. We will not invade. We will not merge with intelligent life without consent," a so-called Galactic League treaty was signed with the E-RO. In a nutshell, the E-RO are now treated as an intelligent race. Now that research on the E-RO has progressed, they are allowed to live a normal life through a special operation. Nevertheless, the information shared by the E-RO as a whole remains the same: "Douglas is a natural enemy".