"Good character" refers to good calligraphy or writing, and "beauty" refers to beauty, both of which mean beauty and appreciation. This idiom can be used to describe the calligraphy works presented by calligraphers to female friends or partners, and it can also be used to describe the act of presenting kind words to beautiful women.
The idiom "Good words give beauty" is often used to praise other people's calligraphy works, indicating that this work has a high level of calligraphy and can be given as a gift to relatives and friends or a collection.