Let's say I have three levels in Barbarian and three in Fighter.
As a barbarian, I choose the Path of the Ancestral Guardian subclass, so I gain the Ancestral Protectors feature (XGtE, p. 10):
While you’re raging, the first creature you hit with an attack on your turn becomes the target of the warriors, which hinder its attacks. Until the start of your next turn, that target has disadvantage on any attack roll that isn't against you, and when the target hits a creature other than you with an attack, that creature has resistance to the damage of the target’s attacks.
I also choose to be an Echo Knight as my Fighter subclass. The second bullet of the Manifest Echo feature says (EGtW, p. 183):
When you take the Attack action on your turn, any attack you make with that action can originate from your space or the echo's space. You make this choice for each attack.
How do the Ancestral Protectors and Manifest Echo features interact?
If my first attack originates from the echo's space (i.e. the echo attacks), would the Ancestral Protectors encourage the enemy to attack the echo (i.e. by hindering attacks against targets other than the echo), or to attack my character (as normal for Ancestral Protectors)?
If it encourages the enemy to attack the echo, does the effect remain even after it is dispersed, so the baddy still attacks other targets with disadvantage?
Or does it just encourage the enemy to attack me, as usual? (In that case, I can basically use the echo to make me a super-annoying ranged tank that forces enemies to choose between trying to chase me down, and attacking a target other than me with both disadvantage on the attack and resistance to the damage for the target.)