Vairochana is regarded as first Dhyani Buddha by the Nepalese Buddhist. His place is in the sanctum of the stupa where he is the master of whole temple and its contents.
Akshobhya Buddha is one of the five Tathagatas symbolizing mirror like wisdom (in Sanskrit Adarsa Jnana) which means the wisdom like space, all pervasive, without periphery and without characteristics.