Allow adoption + better use of Trust

Another post mentioning the "WoL's child" or something gave inspiration for this thought process.

Allow the WoL to adopt 1 child per character. Something that can both operate on-field like a chocobo, but also be able to take them into Trusts as well.
For player given races, allow them to be customizable in creation, and then through choices they can be made versatile as a healer, tank, or dps role and what kind of jobs/classes they would pick. But also, allow the option to, without being able to really customize their appearance, have one of the friendly beast tribes that you reach max rank with as another optional race for an adopted son/daughter. Given them a name, and similar to the gysahl greens, have an item where you can call your adopted son/daughter for a limited time. That way, you can have them for Fates, Trusts, and general on field. Plus, this would drive players to spend time maxing out beast tribe quests to gain the ability to adopt a son/daughter of a tribe they might really like the look of, how they act, or etc.

And for those that want to have more than 1, open the option up to those similar with having more than two retainers to those willing to tack on a monthly fee.

Again, this would be an answer to a number of things. For one, the fantasy for some players having an adopted child to wander the game with, a way to keep the Trust system used and unique, and keeping beast tribes throughout the expansions relevant.