A great moment could be when they first meet and realize how different yet similar their worlds are. Supergirl might be in awe of The Flash's speed, and The Flash could be impressed by Supergirl's strength. It's a moment of mutual respect that often sets the tone for the rest of the story.
One main sad moment was when Ash was separated from Pikachu. They are such a close pair, and being apart was really tough on them. It made Pikachu feel lonely and Ash felt like he was missing a part of himself.
Time is something that catches people off guard. The past has passed, the future has come, and only the present remains.
Those people who I thought would be together forever gradually disappeared from each other's lives. No farewell, no goodbye, only wishing you happiness.
When a special person appears in your life, you will, you will, you will start to live a different life. This is the meaning of love.
Leaving doesn't mean it's over, nor does it mean you can't start over.
Perhaps a moment when Kara is feeling down because she misses her home planet. Diana, knowing how she feels, arranges a surprise for her. She gathers items from different parts of the world that remind Kara of Krypton. This small gesture of thoughtfulness and love can be really touching in the context of the fanfiction.
When Marinette has to constantly keep her identity as Ladybug a secret from her friends and family. It can be really sad as she has to lie and hide things from the people she loves, like when she misses out on normal teenage activities because she has to go save Paris. She feels isolated in that aspect.
There are also the poor Koroks. They are so cute and innocent, yet they are in a world full of danger. Their little homes are sometimes destroyed by monsters or natural disasters, and they rely on Link to help them. It's sad to see such a gentle species struggle in this post - apocalyptic Hyrule.
Supergirl is a popular character in fanfiction. Writers love to explore her powers, her dual identity, and her relationships. Her superhuman abilities make for exciting action scenes, and her kind heart makes her a beloved hero in many stories.
If Barry kidnapped Supergirl in fanfiction, it could be a really interesting plot twist. Maybe Barry has been affected by some sort of red kryptonite - like substance that makes him act out of character. This would lead to a conflict between the Flash and Supergirl's friends and allies. They would be confused as to why Barry would do such a thing.