There's not enough information to say exactly who Kathy is. She could be an ordinary person with an interesting life story, or she might be someone known in a specific community or field.
Chen Kaixi was an assistant director. His representative works included the short film, The Clock That Was Two Minutes Slow. In addition, Chen Kaixi also played a role in the TV series Dear Enemy, played by Chen Yanxi. There was no other information or background information about Chen Kaixi.
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.
Kathy Andrews could be an ordinary person around whom some interesting stories are woven. Maybe she's a character in a local folklore or a self - published collection of stories. Without reading the actual stories, it's difficult to say more about her.
When Lloyd gets possessed, his character can take on a whole new personality. He might start to oppose his friends and the things he once fought for. For example, he could use his powers against the other Ninja. This change is not just about his actions but also his way of thinking. He might view the world from the perspective of the possessing entity, which is often dark and power - hungry. His relationships with his friends also become strained as they try to figure out what's wrong with him and how to save him.
It could be his immediate superior. If his superior was jealous of Lloyd's intelligence or was under pressure from higher - ups to show some results, he might have used a minor mistake of Lloyd's as an excuse to fire him.