I don't think Failsafe would be unpleasant about being our Ghost. I think she'd actually be quite thrilled if we somehow how turned her into an artificial Ghost. I'd have her and my Ghost alongside me. Or why not use Siva for something useful and add an AI component into our suit, so she can come along with us? Either way, I like having her around. We could even bring her to the tower. She'd never be alone then!