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