I wouldn't say possible so much as inevitable, really. We're a ninja, we're going to see horrific shit, and I'd like the ability to eventually let the memory fade, rather than being completely unable to unsee the unpleasant or traumatic things we go through.
Would it have advantages? Sure. Its downsides, however, will only mount as time goes on and things get worse. Eidetic memory is not something you want when you're going to be subject to a bunch of high-stress, likely traumatic events. Sometimes it is better to simply let things fade, and forget.
Yeah, I don't really disagree with any of that. There certainly are a lot of things that are better off forgoten.
I'm not sure how applicable that is to traumatic events, though.
I'd rather not get into this topic, but I will say that everyone has or will experience such things at some point in their lives (death of a relative) and you don't really ever forget them.
Even without an eidetic memory people often remember such events with startling clarity decades later (depending on how traumatic we're talking about). Or they reinvent a new but equally painful memory. An eidetic memory doesn't help with that, but I'm not sure a mediocre one is much of an improvement.
You mostly need to cope with the event on a emotional level. The memory keeps popping up in your mind, but you need to learn how to brush off the effects (at least somewhat) and move on to other this in your life.
That's how I see things, at least.
More importantly though, I'm not a psychologist and this is a game. So I'm not sure how appropriate it is for me delve any deeper in such a topic. I'll have to get some feedback for that.
I do think I undertand you're position, though. I certainly don't disagree with anything you're said so far. There is a big chance for this backfire, particularly since we're playing on hard mode.
And I can't say for sure whether the benefits would outweigh the negatives or vice versa. I suspect that would in large part depend on how well we play the quest.
Mostly, I'm looking at this scenario from a somewhat detached point of view. We're playing a game, with more then 1 lives, this trait seems interesting and I'm curious to see its effects.
I won't be cut up if we don't get it, but I don't thinks it's so bad that I'd take an issue with Katsuragi, if he decides to go for it.