Vaikriya Sarira do they use to interact in heaven
Yes. In Jain philosophy, Vaikriya Sharira is the body of transformation, and it is the subtle body used by celestial beings in the heavens and also by some beings in other realms.
In the heavenly realm, devas use Vaikriya Sharira to:
- appear in different forms,
- move with subtle power,
- interact with other celestial beings,
- and enjoy the heavenly environment.
A few important Jain points:
- It is not the gross physical body like ours.
- It is a subtle, transformable body.
- It is associated with beings who have the capacity for such transformation, especially devas and certain other beings.
- Interaction in heaven happens through this subtle transformed body, not through a human-like material body.
So, in short: yes, heavenly beings use Vaikriya Sharira to interact in heaven.