Sentinels

I was eager to make something dark and epic... Epic fail with Liam...

Well, who are the Sentinels in my realm? 
1. Sentinels are those ones who do the protection of people's lives in Helixem. Their basic duty is to expell or kill dangerous creatures from the other world called Shadows. They're like agents of S.H.I.E.L.D., FBI, MI-6 etc., but everybody knows them in the contrary. 
2. They're team, team and once more team. (In their agency more than two persons above) They must trust and defend each other in dangerous situations.
3. They are very respected and authoritative people in the government (some of them, like Melissa, have more rules and more free than the Guardians).
4. And they always wear dark suit with bright-green strips (exeption is only for the Day of the First-Coming Sun, when they wear light and bright clothes)
5. Sentinels usually are very independent and they obey only their group-leader - the Storyteller.