Thanks for the chapter!
Based on the mansion, hood, sleeves and rings the mysterious figure at the end is likely a high ranked or noble magic user. As for his comment, it's either lack of accurate information about her and not happy is so close to Kaido, and/or one of those politically minded cold blooded psychopaths who don't care about right or wrong, fact or fiction, but only appearances and making politically profitable connections. Then again could be Kaido's relative/close friend with a big chip on his shoulder who believes Kaido should only date/marry a woman of lineage and hero class ability as being barely good enough for Kaido and considers a peasant born, long standing E rank with no notable achievements (due to her old party stealing all the credit and lying,) as not even close to good enough for Kaido. Guess will just have to read on to find out who he is, what he's planning, and what his connection to Kaido is.