No, specialities are like a way of making your bio more unique. Call it like a talent build in a game.I'm going to assume you mean special Bios
https://animebase.me/threads/bio-rules-quick-access.718945/
I read the post of Bio specialties and simply understood that the specialty is simply what element of style you are going to gain the most benefits in skill out of. (I really didn't get the thread)
You pick a pathway of skills to specialise in a certain way.
In this sense you have options, it's broken down for you of how you can choose:
Select:
2 Primary + 1 Secondary, in addition to 1 Extra AND 1 CFS specialties.
or
1 Primary + 2 Secondary, in addition to 1 Extra AND 1 CFS specialties.
or
1 Primary + 1 Secondary + 1 Unique, in addition to 1 Extra and 1 CFS specialties.
If you look into the thread it goes on to break down the specialities into several sections.
When i comes to certain ones, you have to follow a path way of sorts.
If you want the secondary one, that says you can use the element you chose to specialise in without needing a source, you'd need the primary speciality that lets you specialise in an element.
Now, you need to ask questions here, if you don't understand, because i will be testing you on this