Materials

If the material is available via mission clear, see Missions and Ctrl+F the material.

Otherwise, it could be from


 * Breaking parts


 * Devouring after defeat

In short, this list has many incorrect entries, however it will point you in the general direction. Rank is not included. Only the easiest method to obtain the material will be listed.
 * Additional Reward
 * Exchange

It is suggested that you complete all missions, then hunt down those remaining materials.