Add the mango flesh, passionfruit pulp (reserving one for topping), coconut milk, chia seeds, and hemp seeds to a blender.
Blend until smooth and creamy.
Pour the mixture into jars or small containers, depending on portion size.
Place in the fridge to set for 1–2 hours, or until thick and mousse-like.
Top with extra passionfruit before serving, if desired.