Libellago lineata, river heliodor is a species of damselfly in the family Chlorocyphidae. It is found in many Asian countries. The species is found in clear streams or rivers. Wikipedia
Teneral of a Chlorocyphid, could be anything of jewel species (Libellago, Rhynocypha, Heliocypha etc).
The proper term for a young adult dragonfly that has just emerged is a teneral. The Latin root word of teneral, tener, means tender or young. After moulting, an insect is in the teneral stage. An arthropod in the teneral state is described as soft-bodied, as their new exoskeleton has not hardened yet
Thanks, Muhammad Nazri Janra and Marcus Ng Dragonflies of Singapore for the ID.
Location: Mandai – March 2021