yeah i thought that too and got disappointed as well the devs f.ucked up in this part they could gave us kasumi as a companion would be very awesome i will never understand why they didnt put her as a companion they could make some new content where she came back to give us missions or help us in some questline then in the end we could have her as a companion and maybe even romance her later on and that is not impossible to do is just the will and the time to do that.