It is the most whimsically magical, most timely, made my emotions roller coaster. Young parents must engraved and instill the values of movie taught to the new generation of girls..."how brokenness tear us apart".
Spoiler alert:
I could say that it is timely because the evil element might refers to pandemic caused by Virus as the movie mentioned it is man-made monster, (whether the conspiracy theory about intentionality of infecting is true or whether it is a bio-weapon that made them attack vulnerable nations or divide ASEAN).
The Glowing Gem that was created by sacrificing Sisu's siblings' power symbolizes "Power of Harmony, solidarity and Trust" which brings back humanity and balance.
The sibling dragons kept Sisu alive because Sisu a "Phaya Naga" (Thailand/laos/Cambodia/Vietnam) or "Bakunawa" (Philippines) is water dragon that sustain hope and life.
This "only hope and sustainer of life" gem sparks a controversial mindset that it made "heart-of Kumandraland" bountiful which causing other tribe's land feel envious leading to trust issue and grabbing power. Well we can relate this gem to "East vietnam sea/West Philippine sea/Indo-malay water", its current controversies.
So the only solution in order to put back balance and life is to set trust on one another by setting as role model by sacrificing self first. The role of water dragon to Raya is to psychagogy/re-educate her based on her experienced hundred of years ago on how they saved early humans by sacrifycing dragons' life.
People must see Real life KUMANDRA, the ASEAN's land how beautiful, rich, exotic, and unique in terms of cultural diversity, "flora and fauna".