Sometimes Betas are absent, or other intermediate genders such as Deltas and Gammas are added. Since Omegaverse is a type of folksonomy, some of its aspects are included or excluded at the discretion of the story author.
Beta ( β): depending on the story, they are regular human beings, or have a mix of Alpha and Omega traits, or their own unique traits.Alpha ( α): socially (and in some interpretations, even biologically) dominant, physically built, short-tempered and a natural leader.It's usually chosen from one of the following: Omegaverse fiction pairs traditional genders such as male or female with a 'secondary gender', or a 'second dynamic', that manifests during puberty.