Sure, here's an example of unique content optimized for the keyword 'frisk x chara' using synonyms:
1. Frisk with Chara
2. The player character and the lost soul
3. The adventurer x the wanderer
4. The fearless soul and Chara
5. Frisk 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.