NekoKnight

I disagree with that argument. Celica's route plays out as it does because she:

1. Has a huge martyr complex.

2. Is very secretive.

3. Is naive enough to think Jedah will keep his end of the bargain.

Micaiah is self-sacrificing but not to the point of actually dying. She takes risks to her own health and is willing to tarnish her reputation to protect her people, but she's not jumping at the opportunity to end her life.

Micaiah actually confides with her friends/advisor. Sothe is always with her and tells her when she's doing something stupid or immoral. I don't think she'd keep it a secret if she met up with Jedah.

Micaiah didn't like or trust Izuka. She only put up with him because Pelleas wanted him around and in real life you can't just murder coworkers you don't like. That's what HR told me, anyway, when I asked if I could kill Steve for taking my lunch from the staff room refrigerator. I know it was you, Steve! Another important difference between Micaiah and Celica is that Celica just resigned herself to being Jedah's pawn but when Micaiah learned about the blood pact, she immediately looked for a way to break it. She didn't just follow Lekain hoping it would eventually work out.

Well Micaiah was going to sacrifice herself to save Nico, Laura and Pelleas so I do think she has Celica's sacrificial nature. 

I agree. Some guy made a RD review where he ended up pointing out this very fact that Micaiah talks to her allies when devising a plan unlike Celica who keeps everything to herself (16:20). Though at the end of chapter 1-2, she told the DB to split away so that she can turn herself in and let Laura escape. 

You're right, Pelleas was going to blindly follow Lekain before Micaiah told him he's obviously bluffing because it's in his best interest to do so. 

I think Micaiah's intelligence is underrated. 

She might have a selfless nature, but I don't think it's really the same as Celica. Celica's story basically has her give up, resorting to working with Jedah and dying even though he's insane. Micaiah I would describe as the opposite. She has a moral crisis in supporting Daein and Begnion but she's still fighting for a better ending than just "let the obvious bad guy win".