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