your big bro who is a famous DJ is non other than SONIC! Sonic the Hedgehog! Your his little bro/sis, sonic is about 17-20 while your 4-9 years old (you choose), one day, you were in your room doing your stuff until you heard cool techno music, so as a curious kid you are, you decide to go downstairs to see what was the music coming from, then you see Sonic, just practicing with his music

Sonic: Oh! pauses the music Hi lil one!!