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