At launch, Mortal Kombat 11 has a roster of 25 fighters, with one unlockable character and another reserved as a pre-order bonus. However, there are some characters in the Mortal Kombat 11 story mode that some fans may be wondering are playable in the game, like the final boss Kronika, for instance.
Kronika is the main antagonist in the Mortal Kombat 11 story mode, and she is also the final boss in most of the regular Towers. Kronika's gimmick is time-travel, and she uses that to sub-in other Mortal Kombat 11 characters as well as warp the stage with her magic hourglass. Kronika has her own unique move-set, and she even has her own Fatality, which is one of the more brutal and elaborate ones in the entire game. She's also immune to certain attacks, which makes her a rather formidable foe. Considering this, it's no surprise that some Mortal Kombat 11 fans would want to play as Kronika in the game, but it's not possible at this time.
Kronika is not playable in Mortal Kombat 11 at all, despite some rumors going around that she can be unlocked in the Krypt or elsewhere. The only unlockable character in Mortal Kombat 11 is Frost, who is unlocked by either paying for her with real money or advancing to Chapter 4 in the story mode.
However, just because Kronika is not a playable character in Mortal Kombat 11 at launch, it doesn't mean she won't be playable in some form in the future. It's possible that NetherRealm will use Kronika as one of the Mortal Kombat 11 DLC characters, or maybe she will be featured as a playable character in a future game in the series.
Alternatively, Mortal Kombat 11 players on PC may have a chance to play as Kronika and other unplayable characters from story mode in the near future. A mod is in the works for the PC version of Mortal Kombat 11 that lets players play as not only Kronika, but Cyrax and Sektor as well. Console players will still be out of luck, but again, maybe they will have a chance to play as Kronika at some point down the line.
Mortal Kombat 11 is out now for PC, PS4, Switch, and Xbox One.