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