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