[@Lmpkio]

Basically a two character concept.

A researcher from one of the Unknown Sites is dedicated to conducting technology and counter measures from captured kaiju.  One of their containment dubbed 'Angel' is docile and has obtained limited communication with its keepers.  The angel also spawns other smaller creatures that actually can function as a type of synergistic power source targetting AI (think Evangelion where the mechs are organic inside a shell of armor.

The Angel however is a cognito-hazard and slowly warps memory, perceptions, etc.  It grows stronger as more and more people come to rely on its power.  It will even work against humanity, subtly sabotaging efforts to sue terror and mistrust while showing itself as humanities core salvation.

In essence it wants to be worshipped as a god cause worship gives it power.

The researcher unknowingly works to spread its influence, subtly at first but then more and more obviously, like a missionary.