Another theme could be growth. Without the presence of this particular person, the protagonist may be forced to become more independent and grow in ways they wouldn't have otherwise. Maybe they start to discover new aspects of themselves or develop new skills.
It could also be about hope. Despite the person being absent during spring, which is often associated with new beginnings, the story might show how the character still holds onto hope that things will get better or that the person will return. They might find small signs of hope in the beauty of spring around them.
It could be Atsushi. He is a central character in BSD and his kind - hearted yet troubled nature would make for an interesting exploration in a story about a spring without someone important. Maybe the person missing is someone who has been like a mentor to him.
It's a story that explores the longing and emotions when a particular character is absent during the spring season.
Many fanfics of 'A Spring Without You is Coming' might have the theme of friendship. Characters might rely on their friends more in the absence of the important person. Friendship can provide support, comfort, and sometimes even help in the journey of getting over the loss. And there could be themes related to nature as well, as spring is a season full of natural beauty, and the story might use nature to mirror the characters' emotions.
One possible theme could be redemption. As the end is near, a character might seek to make amends for past wrongs. Another could be acceptance of fate. The characters may come to terms with the approaching end and find peace within it. Or it could be about love in the face of doom, where relationships are strengthened or tested as the end looms.
Well, it could also have themes related to memory. The characters might be constantly haunted by memories of the person who is not there. And through these memories, they either learn to cherish the past or find the strength to let go. Additionally, themes of friendship might emerge as other characters support the protagonist in this difficult time of a spring without the special someone.
A third theme could be the cycle of life and death. In a world full of danger and death, Clementine's passing could be seen as a part of this inescapable cycle. This might lead characters to reevaluate their relationship with the world around them, whether it's about being more cautious or more accepting of the inevitable.
It might explore themes like social injustice, prejudice based on race or gender, and the impact on individuals' lives.
One possible theme could be isolation since she is in a prison, even if it's a 'prison of spring'.
Well, it could explore themes of acceptance. How the characters in the fanfic come to accept their new - in the context of the story - sexual orientation within the orc - centric world. Maybe it also delves into the idea of cultural differences within the orc society regarding relationships.
It could involve a magical encounter where a snowflake somehow survives the warmth of spring and brings a touch of winter's charm.