The Runaway is indeed a Marvel comic. It features elements and themes commonly associated with Marvel's comic book style and world-building. The characters and their adventures are integrated into the larger Marvel narrative framework.
It's hard to tell. Without more information about Runaway 34, it's difficult to determine if it's based on real events. Maybe you could provide more details?
One idea could be a crossover where Naruto's world is merged with the one that Gremory and Gabriel exist in. Naruto, with his strong will and ninja skills, could form an alliance with Gremory, who might be from a noble demon family, and Gabriel, an angel. They could fight against a common enemy that threatens both their realms, like a powerful dark force that wants to disrupt the balance between the ninja world, the demon world, and the angelic realm.
A common theme is self - discovery. The male oc often has to figure out his place in the Gremory world and what his powers or abilities truly mean. Another theme is friendship. He usually forms strong bonds with members of the Gremory family or other characters in that realm.
The 'rias gremory light novel' has themes of friendship. Rias forms strong bonds with her comrades. Additionally, there is the theme of redemption in some cases. Some characters are given the chance to atone for their past mistakes. And of course, the theme of good vs. evil is present, though the lines between the two are often blurred in this complex supernatural setting.
The 'High School DxD' light novels, which feature Rias Gremory, are quite popular. Rias is a devil princess in the series. The light novels are filled with elements of fantasy, action, and a bit of romance. The story follows the adventures of the main character, Issei Hyoudou, who gets involved with Rias and the world of devils, angels, and other supernatural beings.