How to get more twitter followers?

[Allie]

So recently i made a fandom twitter. I have been following lots of people and most of them do follow back but then they just unfollow me. I want to know how some fan accounts have 14k and they are following about 10k? I don't like using followtrains etc. I want to follow other fan accounts not personals. Another concern i have is following like 800 people and only have about 200 following me back.. i also have been retweeting gain tweets from other fandoms but i only gain about 5 more followers. If you have reasonable advice it would be very appreciated.