If you're looking for anime similar to Orion, you might like these titles.
Momo Ayase and Okarun are on opposite sides of the paranormal spectrum regarding what they’ll believe in and what they won’t. Their quest to prove each other wrong leads them down a path of secret crushes and paranormal battles they’ll have to participate in to believe!
In the year 1988 Jinki model enthusiast Aoba Tsuzaki is kidnapped and brought to Venezuela, and soon discovers that not only are Jinkis real, but that she will also become a Jinki pilot. Fast forward to the year 1991, and a series of unexplained events known as the Lost Life Phenomenon has been wiping entire cities out of existence. Enter Akao Hiragi, a young girl who has lost her memory and also has a strange tie to the Jinkis. Combined, Aoba and Akao have a common enemy: the evil Kokushou, a man who is hell bent on destroying the world!
A super-powered terrorist has threatened the island of Cenancle. To fight him off, Nene Nanakorobi, a cybernetic girl-next-door, will have to team up with famous inventor Delilah Uzal and her adorably grumpy cyborg assistant, Clarion.
In the distant past, a ferocious monster plagued the land. This creature of fury was finally subdued when a traveler challenged it to a battle and drove a spear into its body, pinning it to a massive rock. A temple was built above it, and thus, the house of Aotsuki was founded. Fast forward to the present, when young Ushio Aotsuki unwittingly releases the beast and names him Tora, much to the monster's dismay. Now, with plenty of stray demons wandering the city, Ushio must defeat the evil with the ancient spear, before being eaten by Tora as a snack!
Rinka is a financially struggling high school girl living with her single father in Tokyo. One day, while going home from school, she sees a penguin flying in the sky towards the Tokyo Sky Tree. She chases after it only to find fish swimming in the air! One of the fish goes through Rinka and causes her to pass out. She wakes up to find that she has developed the ability to slip through solid objects..
"Hundred" - the only weapon capable of fighting the Savages, mysterious life forms attacking Earth. Hayato enters the battleship university Little Garden in hopes of becoming a Slayer... but his roommate Emile Crossfode, who seems to know a lot about him for some reason, awakens a sort of unsettling nostalgia within him. What's more, right after he joins the school, the strongest Slayer at Little Garden, the "Queen" Claire Harvey, challenges him to a duel!
Miu, winning a lottery, invites everyone to go to a newly opened bath house.