[@The Narrator]
[hider=Coldheart CS Review][quote][color=Gray]Among the fae it is known that true love is more powerful than almost anything else, being able to break curses and spells.[/color][/quote]

That is not exactly accurate. Love in the fae realm is... how do I put this, it's not uncommon but... Basically 95% of fae live by the idea that they come before all others, their comforts, their possessions, their power etc. So for fae love is generally considered a passing thing. Especially because they live so long and love is rarely ever truly permanent. That's not to say they won't act on feelings of love or affection. They will quite often. But the idea of giving something up for love or doing something selfless is not inherently in their nature. Not to say that some fae don't but it's not super common. Most fae that would make sacrifices for love are generally considered a little nuts. You get a bit of a pass for those related to you by blood as (unless you'd have them killed) they're pretty much in your life forever but for the most part lasting love in not something they cherish or indeed believe in. The concept of True Love and any kind of magical powers it might have is very much a human one.

Not a super important part of your CS given it was a throwaway line but I thought it important to mention to avoid confusion down the line.

[quote][color=Gray]Coldheart was born the elder of five brothers.[/color][/quote]

Are they quintuplets?

[quote][color=1b1464]"We will not abandon each other. We are strongest with each other. We will hunt together and one day take revenge together. That I swear by my true name, Matchinaw!"[/color][/quote]

Unnecessary and incredibly foolish. An oath made in the fae land is binding. Unless released by the person who the oath was made to an individual can be forced to keep of their end of the bargain. Swearing on the true name or mentioning it at all is unnecessary. Using a fake one could be verified in about five seconds as true name grants total control over a fae. Using the real one is completely foolish for the same reason. So either there's four people in the palace able to control the actions of the king or his brothers knew he was a total liar from day one.

[quote][color=gray]feasting on the humans who got lost through a nearby hole in the [color=White]hedge[/color] that separated their two worlds and crossing over on their own, hunting them in their world.[/color][/quote] 

That's metaphor right, cause the gates aren't generally such a literal boundary.

[quote][color=Gray]Through trickery he knew their true names, while they only thought to know his.[/color][/quote]

It is an extremely simple matter to verify if you have a fae's true name and most fae are not trusting enough to assume it simply to be true, even amongst family. There's no reason that the brothers would actually believe they had Coldheart's true name.

[quote][color=Gray]a spirit of death and decay named Grimm.[/color][/quote] 

The names kind of cliche but not a huge deal I suppose.

[quote][color=Gray]He was also incredibly old, one of the oldest fae in the realm, equal in age to only the king of spring.[/color][/quote]

You would have no way of knowing this but I have three other characters in addition to Nyx. One of there backstories involves an incident with a previous Winter King that ended through his own foolishness in that king's death. He was also a fairly young ruler adding to his recklessness and eventual death. Given that fact their can't have been a Winter King old enough to rival the rumors of the previous Archon's age. Though if you are adamant about keeping this backstory for the previous Winter King I can alter my character's backstory to have taken place in the Fall Court.

[quote][color=Gray]The plan was set. When the King of Winter made it known that he shall hunt and sent for a well known hunter out of the woods the five brother saw their chance. They cornered the hunter the king had sent for on the road to the palace and killed him, devouring all the evidence of their crime. It was then Coldheart lied, telling the King he was the hunter, knowing that the king had never seen the true hunter.

The hunt was the king's last as he was lead right into a trap. The king and his guards fought bravely, blinding one of the five on one eye and cutting of the hand of another. But there was nothing more they could do against the surprise attack.[/color][/quote]

This I'm a bit apprehensive about. Fae smart and guileful enough to take a Court crown and keep it should also be smart enough to avoid a simple ambush. If it was a ruler from another land unfamiliar with the terrain and the Wendigo breed I might understand but this ruler has lead the Winter Court for thousands of years, should know his land very well as well as what sorts of wild fae he might encounter. Remember this should be a guy that would be very used to avoiding assassination attempts. He's aware that Wendigo inhabit the forest and even if Coldheart caught him off guard by being a member of his hunter party the least prepared he could be is bringing the kind of guards that would be able to take a Wendigo. 

Plus if you think about it this wouldn't exactly be a difficult plan for basically any fae to pull off. Kill the hunter enroute to the castle, take his identity, lead the king into a trap on his usual hunt. It didn't take any special knowledge on Coldheart's part or skill specific to him except maybe his physical prowess but Wendigo aren't the only creatures with those kinds of abilities. If this was that easy to accomplish (even with the loss of limbs and such) it's very strange that no other fae has attempted to do it before, or in fact succeeded in doing so.

[quote][indent][h3]| [b]Mother[/b] |[/h3] | [i]Mother[/i] | [b]The love of a son[/b] |[indent] 
 [/indent][color=gray]His mother was for the first time of his live his warden and for the second part the motivation for his revenge. He would never admit he loved her. But she was the only being for which he ever felt that emotion.[/color][/indent][/quote]

Mom doesn't have a name?

[quote][hider=Brothers][indent][h3]| [b]One Eye[/b] |[/h3] | [i]Brother[/i] | [b]Blood is thicker than water[/b] |[/indent]
[indent][color=gray]Be afraid of One eye. The strongest and biggest of the five brothers, he lacks any intelligence and is very gullible but has unquestionable loyalty to his brother. Coldheart values him incredibly much and would sacrifice a thousand subjects for him if he ever should have to.[/color][/indent]

[indent][h3]| [b]Swiftrunner[/b] |[/h3] | [i]Brother[/i] | [b]The perfect soldier[/b] |[/indent] 
[indent][color=gray]Whenever something needs to be done but Coldheart himself cannot do it Swiftrunner will. He is the fastest of the brothers and has the rare attribute to always follow orders but also be able to adapt quickly to a change in a plan and take the initiative.[/color][/indent]

[indent][h3]| [b]Frosteyes[/b] |[/h3] | [i]Brother[/i] | [b]The second in command[/b] |[/indent] 
[indent][color=gray]While Frosteyes lacks the brilliance of his oldest brother the youngest of the five definitely has cunning and even quite the patience and talent for statesmanship. Coldheart quite often delegates tasks to him.[/color][/indent]

[indent][h3]| [b]Ironhand[/b] |[/h3] | [i]Brother[/i] | [b]The King's Executioner[/b] |[/indent] 
[indent][color=gray]The terror of anyone who dares to defy the king. The nightmare of any rebel. Many view him as completely insane and the might be right. He is the most gluttonous and brutal of the five. After he lost his hand in battle he replaced it with a hook whose tip is made of cold iron. What fae would be mad enough to do that?[/color][/indent]
[/hider][/quote]

Where you planning on playing these guys in addition to your Winter King? If so they would require their own separate sheets. 

Also in regard to Ironhand, while the laws about the use of iron are set by the ruler and so with Coldheart's permission the iron hook would be allowed it basically guarantees that Ironhand will never step foot in any of the other courts. If you're cool with that go for it, I just thought I should let you know.[/hider]

[quote][INDENT][color=gray][b]Archon Nyx[/b][/color][/INDENT]
[Indent][color=gray]Coldheart sees the ruler of the Spring Court as a weak diplomat, hiding behind lies and manipulation.[/color][/Indent][/quote]

Clearly I can't accept this character, can you imagine? Someone actually not liking my Nyx, *sigh* simply ludicrous.