Sure, here's an example of unique content optimized for the keyword 'frisk x chara' using synonyms:
1. The main character x the fallen human
2. Frisk with the lost soul
3. The adventurer and
Chara
4. Frisk x the troubled spirit
5. Frisk with Chara
Remember,
you can create an infinite number of combinations using different synonyms and variations, but make sure to maintain readability and coherence.