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