So let's see here. Bikini has :
- Refused to officially side with MC when he got kicked out (yes she was away at the time and got angry that he left without putting up a fight but she could've just quit and followed him if she truly cared) [Ch.1]
- Revealed MC's past that he was trying to conceal (his being a former member of the SWT) [Ch. 6] which contributed to his shop (with several priceless, one-of-a-kind tomes) getting burned down (which she has also partially taken responsibility for, i.e. complicity by inaction) [Ch.11]
- Tried to guilt him into coming back into the party she explicitly knew was and outright decried as poorly led by a commander of dubious skill and sanity (her argument was that he wouldn't be able to level up by caring for his store) [Ch. 6]
- Got "cold feet" when MC was getting his ass whooped by the commander, despite claiming she would step in to help if he was about to lose (mom called her out on it), which forced him into levelling up (rendering the previous point's original argument moot) [Ch.17]
- corollary : the commander had to be removed by MC, not her, so she couldn't even take care of the party she sacrificed everyone and everything for
- Did not defend him as he was getting falsely arrested by her client [Ch.34]
- Outright called him "no longer my friend" and watched him get tortured [Ch.35]
- Defended Isabella from Jean who was trying to rescue her son[Ch. 37]
- Knowingly and willingly aided and abetted a coup attempt against the rulers (AKA high treason) [Ch.44-now] because "I can't abandon those girls." and justified her treatment of Denys with, and I quote : "That time, I already asked you to come back and you refused. So don't think badly of me."
- And now, utterly defeated, tried to paint Jean as being selfish for helping the person she cares about most (and is once again called out on it by mom).
All she has done for MC is oppose him (directly or indirectly), ignore his plight and even actively participate in it and overall refuse to side with him at every turn despite him still helping her out whenever he can. With friends like these...
I can't accept in good faith that she'll be forgiven in a few chapters.
Was Denys not part of that party? Was he not a comrade of hers? If he was so important to her, how the hell do you justify EVERYTHING I've just listed? At ANY point she could've said "fuck this, he matters to me", dropped everything and helped him, like Jean and Atorie did a few chapters ago (Jean quit her position and Atorie reclaimed her family name and responsibilities). But she didn't. They'll be better people than I to forgive someone like that; someone pulled all that shit on me, that's an opp, not someone I'd forgive.