What sidekicks can be gotten without paying real money?

[Prof. Cabbage]

Ive got the Astrub Knight, but his skills are really bland, are there any other sidekicks i can earn though quests?

[HyperOni]

I know they can be sold, i'm not sure if you get more through quests... You can buy them for in game money too, if you can find anyone selling them, that is.

[RoyalGuardian7]

you can get one more through level 140-150 quest later on.

[Dismarsh]

The Asturb Knight, then later when you reach lvl 150 you have a choice between the two Sidekick. I forgot the names but if you open your Sidekick tab (K Key) you will see that there are two sidekicks without a price tag on it. Those two you will be able to unlock later in the game.

[Alien]

Don't diss my homie Astrub Knight.

[EolSunder]

If you play long enough you probably can get any sidekicks you want with in-game buying, but that will take a while before you get enough knowledge and money to learn the market.

[Reborn]

Any sidekick you can easy buy for 1m+ from market. You can easy make $ with professions.