If you read ch 139 once again you'll see that only Ymir knows why Mikasa was the one to "release her from the agony of her love". So question is actually NOT "What Ymir knows" but "Why Mikasa", which is probably more obvious
Only Ymir knows how to free herself. Assuming gaining the power of the Titans messed with her mind the way it scrambled Eren's, then she likely saw her own death and involvement through the paths and the way in which she would be freed.
So she played her part, acting as a slave to the royal bloodline, until Mikasa was born and she, likely due to her connection with a holder of the Founding Titan and Attack Titan, was able to serve as a conduit. By breaking her bond with Eren, Ymir's bond to the paths was broken, and she could finally die.
Ymir couldn't be freed until the Attack and Founding Titan came together with someone unrelated to the royal family, and then was killed by someone who loved them.
Well… Only Ymir knows that that one
How babies are made
Don’t forget that she also knows how to be preyed on by an adult man who later forced her children to eat her.
If you read ch 139 once again you'll see that only Ymir knows why Mikasa was the one to "release her from the agony of her love". So question is actually NOT "What Ymir knows" but "Why Mikasa", which is probably more obvious
Why Lainah wants to kill himself
how mikasa's actual decision looks like (not just the result of it that Eren knew about)
only Ymir 👃that all the panties Krista lost in training days had been stolen by Lainah
What percentage volume of Isayama's onsen is natural water
w what’s the rest of it
Piss, tears and carbonic acid
She only knows how big Karl Fritz’s cock is
I don't know if Ymir knows what Ymir knows But if Ymir knows what Ymir knows then does Ymir knows What Ymir knows 🤯
Maybe
\- It's prank bro - Ymir to Eren
How many licks it takes to get to the tootsie roll center of a tootsie pop.
Maybe Isayama was making fun of the phrase “God only knows”
Ymir knows what Isayama meant by this
The code to open the safe ofc
Only
How many licks to get to the center of a tootsie pop
Only Ymir knows how to free herself. Assuming gaining the power of the Titans messed with her mind the way it scrambled Eren's, then she likely saw her own death and involvement through the paths and the way in which she would be freed. So she played her part, acting as a slave to the royal bloodline, until Mikasa was born and she, likely due to her connection with a holder of the Founding Titan and Attack Titan, was able to serve as a conduit. By breaking her bond with Eren, Ymir's bond to the paths was broken, and she could finally die. Ymir couldn't be freed until the Attack and Founding Titan came together with someone unrelated to the royal family, and then was killed by someone who loved them.
She knows where Cotton-eyed Joe came from and where he went
How to properly take King Fritz seed