One challenge is keeping the characters' personalities consistent. In a crossover, you have to make sure the Darling in the Franxx characters act in a way that is true to their original selves when interacting with characters from another universe. For example, if Hiro is in a crossover with a more light - hearted anime's world, he still has to maintain his somewhat stoic and determined nature.
The main themes in 'Darling in the Franxx' include self - worth. The characters struggle with their place in society and how they are valued. Also, friendship and loyalty play a big part as the characters fight together and rely on each other. And of course, the theme of growing up and maturing is quite prominent as they face various challenges.
The anime 'Darling in the Franxx' is not for all ages. It delves into themes like self - discovery, relationships, and there are also some action - packed and intense mecha fight scenes. Additionally, the way the characters' relationships develop, especially the romantic aspects, makes it more suitable for an older audience, say, teenagers and above.
One interesting crossover could be the sharing of combat skills. For example, the pilots in Darling in the Franxx might learn some of the ninja techniques from Naruto characters. They could incorporate things like shadow clones into their battle strategies, which would add a whole new dynamic to their fights against the Klaxosaurs.
If you're a big fan of the 'Darling in the Franxx' anime, then it might be worth playing. It can offer more in - depth exploration of the story and characters.