((I put partial blame on that to the reason that most plots do not actually offer any motivation to get into them besides "they are the bad guys, you are the good guys, do your thing". Which is literaly what Icarus was made for. When you are not actually born, but build in a lab for military hardware, you tend to think a lot about your purpose in life, but unlike people who are born, Icarus literaly has a clear answer. Her right arm contains a blade that cuts at molecular level, her left arm a futuristic cannon that in larger scale could also be built into spaceships. Her skin is armor, and her eyes contain more modes of vision to more accurately find the enemies weakspot and avoid ambushes than normal vision. Add that to the part where her "childhood" was for a significant part dominated by IRIS feeding her endless hours of combat simulations, where she again and again fought waves and waves of all sorts of enemies, and in the end all simulations ended with everyone she had tagged as an ally dying. That was literaly the dominating lesson, "If I don't fight has hard as I can, people I care for will die". And behold, Isaac literaly just walked the plank, if not for Icarus to immediatly be there to save him. And IRIS aside, in the last thread the PCs seemed a whole lot less squeamish about killing, the exception being Kyle. But here the defining chapter was Ashley being held hostage. Kyle went into depression about not knowing what to do, so Icarus took charge and bam, a few hours later Ashley was free again, and none of the PCs were harmed in the process. 100% success, and again a difficult lesson. "I need to take charge to ensure success". And behold, Icarus plan took down Osmodias fleet. Now after the timeskip, where Icarus had more time to settle her personality and view on life, it will be difficult to still influence her in a different direction, because words are nice and all, but unless someone can lead with a convincing example, the conclusion is, for example right now "Isaac is all talk, but it was me who saved his life. He should learn from me, not the other way around." Even the part where Sen saving Elysia now plays an important role in saving Alice, (partially overshadowed by Sen achieving that by making threats to Icarus regarding Alice), ends in the conclusion "you can spare enemies - you might need them for information". Which I must repeat, is what Icarus was doing in the first place.
tl;dr yes, Icarus is fucked up. But for a reason.))
((Isaac is, btw, rathere unthankful for that part
))