Season is over, there won't be much of Yolanda for a while, seeing as she's still not (as far as I know) appearing in comics anywhere.
Spoiler if you are planning to catch up with the show, don't read.
After fading into the background for a few episodes, Yolanda gets a few moments and an interesting season closing
A few good fight scenes, a great save, and some interesting character drama.
With Rick Tyler determined to kill Grundy, Yolanda and him debate about weather it's right to Kill, she feels it's not, and he sort of mocks her for that.
In the end it's Rick who holds back chooses not to kill, allowing the mindless beast that is Grundy to live, essentially saving himself form becoming that (at least in Yolanda's eyes) .
On the other-hand, ironically Yolanda, goes a different path.
All the characters have lost something in this fight, she might have lost the most as to who she once was.
Once hopeful, sweet, a bit naive, with everything going for her, she is now pushed to her darkest place.
Brainwave plays on that, impersonating Henry trying to get her to reveal her friends, he allows her to believe Henry is alive and saying the things she likely wanted to hear most.
Although she sees through it, or knows she's being naive, recognizes she's being manipulated again. Henry changed, and died fighting for the team, so why is he focused on her alone now?
She realizes this can't be him, and has to let him go ...
...
that does
not end well for Brainwave.
Having to kill (although it's for her team, and understandably a greater good,) sadly puts her into a pretty dark place, and you can tell it's impacted her starting to haunt her, by the end.
Or is it, she's discovering who she
really is?
This is kind of left hanging out there.....
With that, and the next seasons villain reveal, she'll also likely be the one most susceptible.