It depends on how you want it to feel.
There are many simple ones,
Tutuan and round.
The ball is rolling.
Handsome and beautiful.
Morning and twilight.
Warm sun, cold moon.
You can think of a lot of similar ones.
Take whatever you like, as long as it is my personality. For example, the boy's one is called Li Xiaoyao, and the girl's one is called Zhao Ling'er.
In short, do whatever you like.