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