Do I have to control Eos?

[Charisma]

One of those questions even a child should be able to answer. The "obey" command for pets exists for a reason, you know. If it was perfectly fine to just put them on sic they might as well've left Obey out entirely.

It exists for a reason yes, but not because its necessary to use it. the reason is FREEDOM.

You dont really need to, but if you want to be more useful, incase of failure which others or you cause, you should.