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