I'm not sure specifically what 'Cap deage' means. It could be a very specific term, a misspelling, or something relatively unknown. It might be a proper name, a local term in a certain area or a very niche concept.
Since I don't have a deep knowledge of this particular novel, it's hard to say precisely. However, based on the title, it may tell the story of a prince. The word 'eiyuutan' might imply a heroic or epic journey. So, it could be that the so - called 'akuyaku ouji' is on an unexpected heroic journey, facing his inner demons and external enemies, and growing as a character throughout the narrative.
I don't have enough information to say exactly who Cap'n Kathy is. She could be an original character created by the fan fiction writer. Maybe she's a pirate - the 'cap'n' part could suggest that - who has some connection to the wizarding world of Harry Potter.
I don't know for sure, but I assume the 'akuyaku ouji' is one of the main characters. There might also be some side characters like his friends, foes, or family members who play important roles in the story.
I'm not entirely sure as I haven't read it specifically. But generally, 'akuyaku tensei' (villainess reincarnation) light novels often revolve around a female character who is reincarnated as a villainess in a fictional world. She then has to navigate through various challenges, relationships, and often tries to change her fate from being a 'villainess'.
I'm not entirely sure as I haven't read it specifically. But generally, 'akuyaku reijou' often refers to the villainess in Japanese light novels. It might be about the story of a villainess's exile or her life after being banished.
The following are some recommended novels with a loop ending: Beginning, No Life, Trapped in an Infinite Loop on New Year's Eve, Book of Troubled Times, Spirit Walker, Tang's Table, King of Familiar, Fairy, Please Listen to My Explanation, The Death Game of a Full-time Expert, Undying Game, Life and Death Game, and Doomsday Loop? I'm numb!
A cartoon shower cap is known for its eye-catching appearance. It can be in various shapes like animal heads or funny objects. Also, it's usually elasticized to fit different head sizes snugly.