The theme of unity could also be present in the '5 days memorial true story'. People coming together for five days to pay their respects shows a sense of unity. They might be from different backgrounds or have different relationships with the subject of the memorial, but during these five days, they are united in their purpose of commemorating. This could be seen in shared activities like building a memorial structure together or jointly creating a commemorative art piece over the five - day period.
One possible theme could be remembrance. If it's a memorial, then the act of remembering the person or event is central.