In a small saucepan, add in mango nectar and agar powder.
Whisk to combine and bring the mixture to a boil over medium-high heat, for 1-2 minutes.
Remove from heat and let it cool slightly.
Pour the mixture into glass/cups or serving vessel of your choice.
For the nata de coco to be suspended in the mango agar mixture, allow the mixture to cool and set slightly before adding in the nata de coco (coconut gel).
For a more streamlined method, you can add the nata de coco into your serving vessels and then pour the mango agar mixture over top -- just note that the nata de coco will settle to the bottom of the vessel.
Place the cups into the fridge to chill for 1-2 hours, until firmly set.