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