The Gods are either chosen for you, they come to you, or are told to come to you at specific points.
In other words when you dedicate their may be a chief, main, or leader Guardian Daemon. But over time you can have different GD's or multiple GDs based on your development. More than one or just one and it's someone else.
The sheer fact is you shouldn't worry about the situation in racial terms. Whom is chosen for you, is considered the best for your development.
Remember people summon Gods of other races for assistance. For example Vapula/Naphula; she is black but has attributes that people may want or need. Same with the mantras while there might be racial templates for mantras, that doesn't mean vibrating Vapula/Naphula as Yantra-Mantra is going to turn you black or another race.
I thought black people were first made on Earth, by Satan, and the only black gods were originally black humans on Earth who became gods. Is this true?