I would like to ask a question about the Blood Raven's Defensive squad mode.

My understanding is that I can use a half action and then delay. Before my turn i can use a full action.

My gm thinks that: I use half action to delay, and I can use a full action instead of a half action before my turn ends.

So in short words. Does delay consume completely a half round action to be activated or it allows you to move a half round action in some other point in the round?

Normlly a Delay action only allows a character to take a Half Action outside of his normal initiative.

When a Kill-Team is sustaining Battle Knowledge, all Blood Ravens may instead use a Full Action outside of their initiative when they use the Delay action.

The Defensive Mode ability overides the normal rules.

Can I use move and then delay?
Or I have to use delay from the very first moment my turn begins?

Can I use move and then delay?

Or I have to use delay from the very first moment my turn begins?

The description states, "Instead of acting immediately..." so I am going to say you may not use any other actions during your initiative and the Half Action you don't use is the Half Action you are waiting to perform with Delay.