What is a good substitue for midori?

A good substitute for Midori, the bright green melon liqueur, is melon-flavored liqueur like DeKuyper Melon or another fruit liqueur such as peach or strawberry. You can also use a combination of vodka with a splash of melon syrup or melon juice to mimic the flavor. If you're looking for a non-alcoholic option, consider using a melon soda or a mixture of melon puree with soda water.