I'm not sure which book you're referring to because you didn't provide any specific information. But as far as I know, novels are usually named after the female protagonist, so if you can tell me the name of the novel, I'll be more than happy to provide you with more information.
The Royal Guards was the name of the Ming Dynasty's exclusive secret service organization, the Jinyiwei. It was not a nickname for a certain person.
Zhou Lang was the nickname of Zhou Yu, a famous general of Dongwu in the late Eastern Han Dynasty. Zhou Yu was a general who was proficient in military affairs and music. He was called Zhou Lang because of his handsome appearance. He had defeated Cao Cao's army with fire in the Battle of Red Cliff, laying the foundation for the division of the world. Zhou Yu was praised as a handsome man in Jiangzuo and one of the main heroes of Dongwu's military success.
The red-haired monkey was Hanamichi Sakuragi's nickname.
I'm sorry, I don't know which character 'Lan Lin' refers to. Can you provide more background information? This way, I can better answer your questions.
The female protagonist's daughter's nickname is Xingxing, and her name is Hoshino. The novel's name is " The Battle of Glory of the Full-time Expert ".
I can't confirm the name of the novel you mentioned because I don't have the context information. However, according to the information you provided, if the female protagonist of the novel is called "Snow Thief", then this nickname may come from the plot or character setting of the novel or the personality characteristics of the female protagonist herself. This nickname might bring her some special characteristics and charm, but it might also be regarded as a label or symbol of her. But I need more context to answer your question more accurately.
I'm not sure which officialdom novel you're referring to, because this type of novel is very widespread and has many different works. However, if you can provide more background information or a specific name, I can try to help you find the relevant novel.