Here's my first one.
Alias:Shadowmaster
Real name:Ryu
Race:Saiyan
Skin:Caucasian
Hair:Black
Eyes:Black
Build:Average
Age:16
Weight:165
Relatives:Deceased
Personality:Serious, quiet.
History: His family was tired of serving Frieza, so they fled to Earth and hid there. About 2 years before planet Vegeta's destruction. He grew up in the mountains with his family. However, a changeling(like Frieza) with a grudge against saiyans wiped his family out and shot a wave of energy at him. This wounded him and gave him a severe case of amnesia. He survived this because a neighbor saw the blast and went up the mountain to see what happened. He found Ryu and helped him to recover. However, since neither knew his past, he went out to try and get his memory back.