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