Is better than when used to describe someone?

"Better than" is not a complete phrase, and it doesn't make sense to use it on its own to describe someone. You need to add something after "better than" to create a meaningful comparison.

For example:

* "She is better than her brother at playing the piano." This compares her skill to her brother's.

* "He is better than he used to be at handling stress." This compares his current state to his past.

To use "better than" to describe someone, you need to specify what they are better than:

* "He is better than average at math."

* "She is better than most people at remembering names."

* "They are better than anyone I know at making people laugh."

Remember to always complete the comparison to make your sentence clear and grammatically correct.