Its canonical resource path is "Actor".
The Actor directory contains files defining the actor objects that populate the game world (e.g. enemies, buildings, NPCs). It also includes configuration files for the actor and AI system.
ActorInfo.product.sbyml (found in the Actor directory) is a Yaz0-compressed BYML file which contains general information about all actors in the game. It is used when constructing actors, and also used to access actor data efficiently when loading the full actor pack is unnecessary (e.g. on menu screens). Therefore, in order to add new actors, or to change items' parameters on menu screens, this file must be edited.
ActorInfo is a machine generated file. It is not meant to be edited directly; much of the information it includes are either automatically generated or copied from ActorParam files (which can be found in the game content) and other source-only files.
Its canonical resource path is "Actor/ActorTemplate.byml".
Actor/ActorTemplate.byml configures the game's actor profiles.
ResidentActors is a BYML file that contains a list of resident actors, i.e. actors that are always loaded in memory.
In actor packs
Actor configuration files.
Dummy ActorParam configuration files that are used as fallback when loading actors.
Its canonical resource path is "Actor/AS/".
Its canonical resource path is "Actor/Pack".
Contains a collection of actor pack archives, each of which contains the data for one actor.
Its canonical resource path is "Actor/AIDef/".
Its canonical resource path is "Actor/Effect/".
Its canonical resource path is "Actor/Sound/".
Its canonical resource path is "Actor/XLink/".