To create engaging characters, start with giving Percy's parents distinct personalities. For his mom, you could make her really strong - willed and intelligent, maybe a bit overprotective. His dad could be more laid - back but with a hidden depth of power. Also, give them quirks. For example, his mom always has a lucky charm she fiddles with when she's nervous, and his dad has a unique laugh. Their appearance can also play a role. If his mom has bright red hair and his dad has a long, flowing beard, it helps the readers visualize them better.
One idea could be that Percy's parents are from different worlds, like his mom is from a modern human world and his dad is from a magical realm. When they meet, there are cultural clashes and misunderstandings. For example, his dad doesn't understand modern technology and his mom is shocked by the magical creatures his dad brings along. Another idea is that Percy has been hiding his true self from his parents, and when they finally meet, he has to come clean about his adventures and powers. This could lead to a range of emotions from disbelief to pride. Or perhaps there's some sort of danger that forces Percy and his parents to meet and work together, and in the process, they really get to know each other for the first time.
In the fanfic, Percy might be really nervous when he meets Annabeth's parents. He could be worried about making a good impression. Maybe he tries to be on his best behavior, like being extra polite and respectful.
Sometimes, other characters from the Percy Jackson universe might also make an appearance. For example, Annabeth could be involved. She is Percy's girlfriend and is very intelligent. Her presence could add an interesting dynamic, like she could be the voice of reason when Percy and Poseidon are at odds. Or Grover, Percy's satyr friend, might be there to provide some comical relief and also offer his own insights based on his knowledge of the mythological world.
Give them strong motivations. For example, a character from the past might be motivated by a sense of honor or a quest for knowledge. A character from the future could be driven by a desire to correct the mistakes of the past. Their interactions based on these motivations can be very engaging.
He might be a bit shy at first.
Let their personalities shine through their dialogue. A brash and confident character will speak differently from a shy and reserved one. Make sure the way they talk reflects who they are. For instance, a character who is really into technology might use a lot of tech - related jargon when they speak. Also, show their growth throughout the story. Maybe a novice attorney starts off being very nervous but gradually becomes more self - assured as they gain experience in different cases.
Base their backstories on the RWBY lore. Maybe a character has a family history related to a past Grimm attack or a lost relic. These backstories can influence their choices in the fanfic. For instance, a character whose family was hurt by a certain type of Grimm might be more likely to choose a more aggressive option when dealing with that type of Grimm again.
Think about the relationships between your characters. A character who has a long - standing rivalry with another can add a lot of drama. For instance, two builders who are always competing to see who can create the best structures. Their interactions, whether it's through friendly competition or bitter envy, can keep the reader interested. Also, don't be afraid to give your characters flaws. A character who is overly greedy for resources might make decisions that lead to problems for themselves and others, making the story more complex and engaging.
Create characters with different relationships to the crimson darkness. One character might be a scientist who is fascinated by it and wants to study it, while another could be a spiritual leader who believes it's a sign of the end of the world and tries to warn people. Also, think about their physical and personality traits. A character who has lived in the presence of the crimson darkness for a long time might have a pale complexion and a withdrawn personality.
To create engaging characters in a 'tell it to the marines fanfic', give them distinct personalities. For example, one marine could be the tough - as - nails leader, while another could be the comic relief with a heart of gold. This contrast makes them interesting.