The main characters are Frau and Teito. Frau is likely to have some unique characteristics or abilities, and Teito also has his own story and personality.
Frau Hermann in 'The Book Thief' has a sad story mainly centered around the war. Her son was killed in the war, which left her in a state of perpetual grief. This event made her withdrawn and she often seemed lost in her own world of sorrow. She found some connection with Liesel through books, but the underlying sadness never really left her.
The 'Girls und Panzer Light Novel' focuses on the adventures of the girls in a world where tank battles are a big part of their school activities. The story delves into their training, their relationships with each other, and how they overcome challenges in the battlefield. There are also details about different types of tanks and their characteristics, which adds to the overall charm of the story.
I'm not sure specifically as I haven't read it. But generally, a graphic novel combines visual art with storytelling. 'Sonne und Beton' might be about various themes like urban life (since 'beton' means concrete in German, could imply an urban setting) and perhaps something related to the sun which could symbolize hope, warmth or new beginnings in the context of the story.
It's a visual novel related to the 'Girls und Panzer' series. It likely features the characters from the original work in new storylines. Maybe it involves the tank battles and the unique relationships among the girls in a more interactive and text - based adventure format.
One interesting plot point could be the relationship development between Frau and Teito. Maybe they have some sort of adventure together that deepens their bond.
Since I'm not familiar with this graphic novel, it's difficult to determine the main characters. However, given the title, there might be characters who are either trying to escape from a cold, concrete - like existence (represented by 'beton') and are drawn to something symbolized by the sun, like hope or a better life. Or perhaps there are characters who are part of a world where the sun and the concrete play important roles in their daily lives and personalities.
It's about the story presented in the 'Girls und Panzer' movie in the form of a novel. It likely contains the exciting tank battles, the unique characters, and the development of the plot that the movie showcases.