Okay so me and @xsparklingravenx were thinking about this scene and how it could link to XC2 and!!
So it looks like a seer is Alvis’ equivalent of driver which is interesting given the fact the we know Alvis is the Monado (even though at this point Shulk doesn’t) and how he refers to the power as being “ours” before talking about how it’s his families ceremony. If his family are therefore all involved with blades and drivers, it would make sense for him to be referring to Pyra and Malos, which would surely then back the idea that Alvis is actually Ontos.