Betrayal could be a theme. The 'dark side' often involves characters turning on one another, and red could be associated with the passion or anger that drives that betrayal.
One possible theme could be danger. Since red can signify danger and 'dark side' implies something negative, danger might be a central theme.
Some themes could be related to secrets and betrayal. In an illustrated story, we might see characters hiding things from each other, and the dark side would be the consequences of these actions. Also, the theme of loss, whether it's the loss of innocence or the loss of someone dear, could be explored through the illustrations.
One possible plotline is that Superman is tricked by an alien race into believing that Earth is a threat to the universe. So, he decides to use his powers to stop Earth from 'causing harm', which is really him going to the dark side as he's misinformed.
The dark side of the UFO story might include the exploitation of public fascination. Some people or groups could use the mystery around UFOs to make money through selling fake footage or books full of false claims. There may also be a psychological impact. The constant speculation and lack of definite answers can cause anxiety among those who are deeply interested in the topic. And if there are real alien encounters associated with UFOs, the potential for unethical study or experimentation on the part of humans is also a dark aspect.
Isolation could be a theme. In the dark, one can feel very alone. If it's a story about a person in a dark place, they might be cut off from others and have to deal with their situation by themselves. Also, survival can be a theme. If the 'in the dark' situation is dangerous, like in a dark cave full of hazards, the characters would be focused on surviving.
One possible theme could be fear. The darkness of the room can symbolize the unknown, which often induces fear in people.
Isolation could be a theme. A dark tale might be set in a desolate place or the characters might be isolated in some way, which adds to the overall sense of gloom. Also, the theme of loss can be present. This could be the loss of a loved one, of innocence, or of hope, all of which contribute to the darkness of the story. For example, in a story where a character has lost their family in a tragic event, it sets a very dark mood.
Another theme might be isolation. At night, especially if it's very dark, a person can feel alone and cut off from the rest of the world. This sense of isolation can be a strong theme in the story.
I'm not entirely sure what 'the red the dark side story' specifically means. It could potentially be about a story related to the darker aspects of something that is red. Maybe it's about a red - themed horror story or a tale about the hidden, negative side of a red - colored object or concept.
One possible plotline could be that the dentist has a secret addiction to causing pain rather than relieving it. Maybe they use their position to experiment on patients in unethical ways.
One possible theme could be nature. Switzerland is known for its beautiful mountains, lakes and forests. So the love story might be centered around the couple's connection to nature there.