With Sei sequestered to the palace, Jude has to make excuses for her to Prince Ten’yuu, who shows up day after day asking about her. When it becomes untenable for Jude to continue to do so, Johan and Sei agree the best way to proceed is by making herself available to the prince, so they can try to learn what he’s after.
When he spots her packing up a huge amount of mid-level potions and asks how many people crafted them, Sei has to lie and say four to five, because she’d give away too much about herself if she told the truth: she made them all herself.
Lying doesn’t come naturally to Sei, but she does learn one thing: the prince knows his stuff, and seems keenly interested in high-level potions. Believing a good offense to be the best defense, Sei resolves to learn more about Zaideran medicine so that she can steer their lengthy conversations away from places where she could be exposed as the Holy Saint.
To that end, she meets with the merchants Oscar and Franz, who make the connection between the prince and the sea captain Seiran. Sei also hopes to study up with Liz in the library, but Commander Hawke shows up before Liz to tell Sei he’ll be headed home for a while and wanted to see her. Liz makes a tactical retreat, allowing Al to help Sei devise a plan to deal with Ten’yuu.
The next day at the institute, Ten’yuu comes by as usual, but this time says that he’ll be going to other facilities going forward. Then Albert rolls in to discuss, quite loudly with Sei, his unit’s need for more high-level potions, and asking if she could reach out to her alchemist friend to make some.
Ten’yuu later apolgizes to Sei for overhearing them (which was their intent), and asks her directly if he’ll put him in contact with that alchemist. Sei in turn asks what exactly the prince needs, and he tells her: he’s seeking someone who can brew a potion for muscular distrophy…for his mother.
That’s right, Ten’yuu wasn’t sent to spy on Salutania or steal its secrets, simply to to seek out what he could not acquire in his homeland. Now that Sei knows the truth, I doubt she’d hesitate to help him out. However, Johan has made clear they don’t want Zaidera to know she’s the Saint, so she may have to get a little creative to do so.