[@Tracyarmav]
You can use whatever trigger you want. Everyone will have their own. I only used anger but because right now that is Roxy's trigger. If he is clinically depressed he would have a harder time shifting because he doesn't have the motivation to shift. Even if he thinks of his sisters every time it will take time for the memory to motivate him. Yes shifting time will depress with time and practice. It would go something like an hour, forty five minutes, half hour, fifteen minutes, five minutes. How long this will take will vary from person to person but it would take even the most motivated, focused person atleast a week or more to reduce the time.