Clouded by the Regret (Saiko/Hisana)

Feeding: When it comes to feasting, Saiko's self-sustenance doesn't necessarily need it. The reason for this is because her spiritual core can sustain itself by constantly devouring her inner soul. What this translates into is the fact that her own constant strife of anxiety, sorrow and instability can be used as a metaphysical substance which her body naturally feeds off of to maintain it's existence. She is the essence of melancholy, so it makes sense that such a thing could occur when you consider how in-tuned and harmonized demons are with their powers.

Ergo, she doesn't need to consume much of anything per say. Sure she'll get grumpy, irritable and somewhat exhausted; but she won't ever die from not eating. Instead, any kind of feeding is considered a means of healing, psychological relief or a means to make her stronger. There are many different ways in which Saiko can feast due to her half demonic, half-shinigami make-up. And, because of that, there are many varying levels of satisfaction had from these methods.

There can be moderate levels of satisfaction had when Saiko is able to eat traditional solid foods. Things such as meats, vegetables, sweets and other delights can be tolerated and enjoyed. These can be broken down, turned into additional energy and made to help her recover from battles. However, she seems to indulge in these because they also seem to remind her of the days when she was human and it has an odd psychological effect on her. So, for Saiko, she eats traditional food as a coping mechanism and it helps to relax her ever fried nerves.

It's also quite possible for Saiko to feast upon the elements of sorrow, sadness, depression and all things melancholy. This gives her a special type of fulfillment and nourishment because it's one of the core elements of her powers. It would be akin to a meat eating animal finding the tender delight of consuming flesh for her. She has been known to visit insane asylums, war zones, hospitals, graveyards and other such locations where this glum is rich and vibrant in order to further fill this beastly hunger.

However, what is most notable about it is that she is capable of absolving the torment of someone else's anguish. That is to say when she feasts off someones sullen nature, it's possible for them to begin to feel relief and relish from Saiko absolving them of their mental anguish. Without any corruption left in their mind, they can be free of these thoughts for some time to come. As it isn't to say it won't return, but they could find great satisfaction and content after being feasted upon. This even applies to elements of anxiety and irritation as they are within this spectrum as well.

Additionally, because of her demonic nature, she can find nourishment from consuming the flesh, blood, bones and organs of other living creatures. Whether they be animal, human, demon, shinigami or mythical in nature; if Saiko can touch it -- she can eat it. And if she can eat it -- it can help to mend her. If she were to partake more in this aspect of her demonic essence, she'd more than likely be able to further her progression. This is because their vital essence would accumulate over time in order to serve as long-lasting stamina, fuel and life to assist in Saiko's body being as refined as can be. Instead, the only blood she'd ever want to take is Ash's because it feels her void with love and light.

Which then brings us to the final way Saiko can devour: energy. It is possible for her mouth and the particles of power which make up her energy to consume other systems. Now, this doesn't mean that she can consume an opponents energy and become super strong. No. What this means is that she can consume free flowing spiritual particles, exuding energy from those recently decease and any energy which isn't necessarily claimed. If she does this, her body can rapidly repair, heal and become stronger if she is not in combat.

However, if she were given blood or energy by someone at her side, it would be possible to mend her injuries, restore her health and improve her energy by noticeable measurements. As, going back to her bond with Ash, it would be possible for her to feast upon his blood and energy in order to rejuvenate upwards of 2/4 of her energy, health and stamina. Granted, like most things, there is a limit. Demon's cannot infinitely feast, so there comes a point where Saiko feels "full" and is unable to feast on things which help her to heal. When that occurs, these benefits stop more often than not.