I managed to finish Mélusine and Miyu's skills.

She is the 1st Servant of the Lancer Class who has all 3 skills at level 10, it seems that the Archers and Berserkers are going to have a bad day.

And I managed to finish Miyu's skills, because I was thinking of doing the same thing that happened 5 months ago despite Kama appearing at the event, and I was planning to do the same as what happened in the Ōoku Main Interlude, in the battle against Kama in Act 7 of the Ōoku Main Interlude, using Illya and Miyu, along with Castoria as Friend Support, but the problem is that I don't know which Kama ascension will appear in the Round 4 Quest.

Because in the Main Interlude of Ōoku, I already confronted the Kama of the 2nd Ascension twice, the Kama/Mara, it was twice but with 2 classes: Foreginer in Act 7, and Alter Ego in Act 10 of the 1st part.