Are they actually sisters, or just friends?
At this rate, the budding mutual interest between Chris and Sora isn't gonna happen. The happy days where Sora, Chris, and Rurika adventured is gonna stop soon. What's Sora's gonna do next? His dream is to travel the world, after all, but he's only an E-Rank adventurer. He's gonna need better credentials to travel the world, right?
Arko and Syphon seemed to like Chris and Sora together, but Arko flirting with Chris like that was always going to end with Rurika banging his head. Those two need something subtle to get them together.