Well, it's hard to say exactly. Different editions of the novel might have different attributions. You could try checking the copyright page or looking for reviews that mention the author.
In the manga, it's not straightforward to identify a single father figure. There are multiple characters who could potentially play that role depending on your interpretation.
The word "father" may have different meanings in different novels, but it usually refers to the child's parent or guardian. In some novels, the father may refer to the biological father of the child, but in other novels, the father may refer to the adoptive father of the child or the role of the father in other relationships. Therefore, it was impossible to determine the specific meaning of a father in a particular novel. It had to be understood according to the context and plot.
The author of the poem "Daddy's Snore" was Ding Ling, a famous modern Chinese poet. This poem was published in 1936 and was one of Ding Ling's representative works. It described a scene of a father snoring before his son went to bed, expressing his feelings for the warmth and affection of a family. This poem, which expressed the author's concern and love for his family in simple and vivid language, was regarded as a classic in the history of modern Chinese poetry.
Sirius Black is a very common 'daddy' character. In the original story, he was Harry's godfather, so it's easy to expand on that relationship in fanfiction. He has the potential to be a loving and protective figure for Harry.
I'm not sure what specific 'thing' you are referring to. If it's something like a collection of items, it depends on what it is. For example, if it's a collection of stamps, daddy might be happy to show it if he is a stamp collector.