#faerylore

Both can change shape visually but only Unseelie do it on a physical level.

Seelie hearts are white and inverted like monster hearts still. Unseelie hearts however are flipped due to corruption but still white, they turn a pastel color if an Unseelie has absorbed a human soul, reflecting the trait of the victim.

Both are vulnerable to iron and get sick if around it too long due to magic suppression.

Seelie shrink in the human world due to lack of potent magic. Unseelie remain full sized if they have absorbed human souls.

All Seelie/Unseelie/Mages can see each others magic in the form of outlines around each other if the other permits or emotions are running high.

Both are Fae, Seelie and Unseelie are simply different states of existence. 

A Seelie is “pure” as in they follow the unwritten rules of nature and the primal flow of magic and how it functions. Unseelie are corrupted fae that have gone against their base nature, betrayed their own identities, and morals.

The line between Seelie and Unseelie is thin and easily crossed, sometimes not even knowingly, but the intent behind the actions that can send a Seelie down the Unseelie path is what causes a transformation.

When Seelie turn Unseelie they take on a permanent change in appearance to reflect the twist to their beings. 

Unseelie tend to be more primal and feral, very rarely do they maintain a form of sanity, which is usually determined by how powerful they are as a Seelie. 

The “sane” Unseelie are uncaring and will more often than not pull off uneven trades or deals, they are the ones to truly watch out for and a deal should always be avoided with them.

No one is born an Unseelie, a Seelie has to violate nature to become one, everyone is born Seelie. 

Pranks, Word Play, Jokes, these are all greatly valued in the Seelie community. A way of life and foundation for how Fae society flourishes via deals and wishes, contracts and agreements. Combine that with the day that usually heralds each cycle of rejuvenation accompanying an End of an Era and a new royal's ascension to the throne… 

You have one heck of a party. 

A yearly celebrated day of festivities where Seelie get to remind themselves who they are and take joy in their traditions, while being reminded of the coming and passing of each generation before them. 

A day of pride and remembrance.

Or more accurately what the human’s call April Fools Day. 

No one really remembers when April Fools day was established in the Seelie Realm, as a matter of fact it went by another name at one point in time. How humans learned of it, well, whose a Fae that doesn’t take the chance to mess with non-magic beings for fun? 

In the Seelie Realm the day is held to such high standards and carried out with such abandon that it’s required for family units to have an agreed upon “magic word” to indicate when someone is serious about a situation or not. Often it’s suggested the word be something quickly memorized and can be easily heard when used so the intent behind it can be felt by those nearest it. 

Not only is this a day used to have fun, but also as a means of other Seelie to evaluate each other and to establish new reputations, as well as potential partnerships both in business and personal life. 

A rule of thumb; any deals struck on April Fools day have to be carried out and fulfilled within the day’s time frame. Due to the ruckus and over eager shenanigans that can occur indulging in the holiday this rule is unspoken and usually followed as to not in debt one Seelie to another beyond reason.