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.
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.