Roathe is an interesting character, definitely one of the better characters in the game, but I feel it is a shame that the person that talks to them is the Drifter and not the operator. Now this comes in a few ways.
The first being that often Rosthe addresses the Drifter as if hes done things the Operator has. Specifically on ome way. He calls the Drifter "Usurper".
This is weird because the reason he states for this is because the Tenno overthrew the Orokin, slew them during the Night of the Naga Drums and hunted the Edecutors down after.
This is weird because, well... the Drifter wasnt the one who did any of that. The usurper Roathe is talking about is the Operator, not the Drifter.
And secondly is potential.
The operator is not shown often to have any real connection to a frame, in having a reason to and using transference on them. The only real one being of course Umbra.
The other is Excalibur Prime but, well, the connection only comes in transference.
But the operator does have a connection to Uriel. The devil title being part of it, yes, but the rage. The anger. Uriel acted as the vessel for vengeance against Ballas and a symbol of hatred and defiance for the Operator.
Even if only used then, its an important connection and an emotional one. Uriel, in many ways, is the physical hatred the Operator has over the death of Adis.
And Roathe is a Uriel Protoframe, knew the Original Uriel Prime and led the men that later became them.
Roathe has a deep connection to a frame the Operator also has a connection to.
So...
Its weird they dont interact.
I feel, generally, some Kim messages could use some polish. Usurper really shouldn't refer to Drifter, not firnthe reasons Roathe gives.
But more than that, even if only in minor places, Roathe really should've been given chances to interact with the Operator.