Ahhh, okay I think I see what you are getting at.

The origin of an object can be set/adjusted in the SetUp room or by opening the JointEditor in the Pose room, move your cursor over the green crosshair until it turns into a bullseye...but it sounds like you have that down.

The position that an object comes onto the stage is how that obj was modeled in regards to the oreintation of the x,y,z axis and position. Aiko was modeled to come onto the stage at that position, okay? Now can you change that? Sure, there are a couple of ways but one way is to import your obj file onto the stage, position it as you wish, now export that obj file. You have just locked the x,y,z positioning of that exported obj file. Now when you import that obj file it will come onto the stage where you positioned it.

There are other ways to lock in the positioning of an obj too.

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