beta
from context clues alone, in the past 10~ish chapters the duke asked the emperor if he'll grant Clarice a temporary identity tied to him (like a recognized guarantor or guardianship)
the redhead is the empress with a former engagement to the duke. no idea why she's the one to deliver the token of Clarice's identity.
my guess for what's happen: with pressure unilaterally against the adopted son, the two that were formerly engaged was dissolved. and the duke had a more platonic perspective on their relationship. the empress has her own wishes to reach out, and it just so happens that the emperor enjoys shenanigans. (he's vain about his own beauty. has fun getting a rise. so far there is no mention of a heir between the royal couple)