Angel's and demon's can't coexist. Right?

The realms of Heaven and the Infernal Kingdom have been separated for centuries by an enormous barrier of light and shadow. Hiccup dreams of bringing peace for angels and demons to live together, while forces on both sides fear what that reunion might bring. Rather than a battle between good and evil, the conflict centers on whether the two worlds can overcome generations of mistrust and coexist.

Hiccup has always gotten odd looks from angels due to him being an fallen angel, despite his father, Stoick being a Seraph. He still here's whispers but soon meet three other angels, Astrid, Fishlegs, and Guest. Astrid was an Archangel that were known as heaven's greatest warriors. Fishlegs was a Scholar angel that were known for their keep of ancient knowledge. And Guest was an Celestial Gardener known for their the caregivers of Heaven's magical garden's and uses plant magic. They ended up becoming friends for years then Hiccup decided to share his goal with them, which left the three in shock. But soon they grew into it and gave hin their support.

A while ago, Hiccup had done some research on his family tree out of curiosity. And realized he was related to a demon— Snotlout Jorgenson, a general. Which led to Hiccup crossing the boarder to meet Snotlout and they talked for a while, and Snotlout introduced the twins— Ruff and Tuff, chaos demon's. And this got Hiccup slightly excited and he decided to make both of his friends from both sides meet, when they did there was brief silence that was a bit awkward. But overtime the tension faded and the group got along great despite the differences, now they've been friend's for five years.

Since neither group could go to Heaven or Infernal Realm, they decided to meet up in secret— an old sanctuary. The old sanctuary had long since been forgotten by both Heaven and the Infernal Realm. Hidden deep within an ancient valley where golden trees met dark stone cliffs, it was one of the few places where neither celestial wards nor infernal magic claimed dominion. Wildflowers grew freely among broken marble pillars, crystal-clear streams wound through moss-covered ruins, and enormous trees stretched their branches overhead, their leaves glowing softly in shades of silver and emerald.

It was here that the group gathered. Never all at once. Never in broad daylight. Never where another angel or demon might see. One by one, each person arrived with the sounds of wings or clothes rustling. Fishlegs had already become engrossed in a weathered scroll, and talked about in rapid speed to Hiccup who blinked at him. With Astrid leaning against the broken pillars keeping watch and sharpened her spear. Ruffnut and Tuffnut had somehow convinced Snotlout to participate in an obstacle course they had hastily built from fallen logs, loose stones, and old ruins. Their rules changed every few minutes depending on who happened to be winning.

“That doesn’t count!” Snotlout yelled.

“It absolutely counts!” Ruffnut yelled back.

“You made that rule up!” Snotlout said.

“I improved it.” Ruffnut said again and rolled her eyes.

Guest had brought of basket filled with fresh berries from Heaven’s gardens, warm honey rolls, and a pitcher of sweet flower nectar.