Another theme could be self - discovery. Maybe the secret is something that Matthias is gradually uncovering about himself, like a long - lost heritage or a hidden talent. This could lead to a journey of self - exploration.
One possible theme could be secrecy and trust. If Matthias is keeping a secret, it might involve issues of who he can trust with this information.
One possible theme could be secrecy itself. How secrets are kept, what the consequences of keeping or revealing secrets are. Another theme might be about Melanie's identity, and how these secrets are related to who she is.
Since I'm not sure what this 'Matthias secret story' is about, it could potentially be a fictional story. Maybe Matthias has a secret power in a magical world, or perhaps he's hiding a relationship from his friends and family. There are so many possibilities.
A theme of mystery could be present. Since it's a secret story, there might be elements of the unknown, like a hidden family heirloom, a mysterious stranger in Sabrina's life, or a secret place that she visits. This mystery could keep the readers or viewers on the edge of their seats as they try to figure out what's really going on in Sabrina's world.
One possible theme could be mystery. Since it's a secret box, there's likely something mysterious about it, like what's inside and why it's a secret.
Love and relationships can be a theme as well. How her new status as an heiress affects her relationships, both romantic and with family and friends. For example, does her new - found wealth attract false friends or does it put a strain on her existing relationships? Also, the theme of self - discovery is important. As she uncovers the truth about her inheritance, she also discovers more about herself, her family's past, and what she really wants in life.
One possible theme could be mystery. Since it's a secret story, there must be elements that are not immediately known and need to be uncovered.
One possible theme could be mystery. Since it's a secret basement, there's an air of mystery about what's inside it.
Friendship could also be a theme. Since she can't rely solely on her royal status, she has to make real friends. Through her secret, she might attract people who like her for who she is, not what she is, and these friendships help her in her journey in the 'the secret princess story'.
One possible theme could be secrecy itself. How secrets can both protect and harm the characters involved. For example, a character might keep a secret to protect a loved one but end up causing more trouble because of it.
Another theme could be trust. If Cassandra is holding secrets, the story may deal with who she can trust with those secrets and how trust is built or broken in the context of secrecy. It could also show how others react when they suspect she has secrets. For example, they might become suspicious or overly curious. Additionally, a theme of self - discovery could be present. As Cassandra navigates her secrets, she might learn more about herself, her values, and what she really wants in life.