I am trying to get transfusion through the the monster in the ship yard (begins with a c and looks like a funky white cloud). I cast "confusion" on it. It does transfusion and dies but nothing happens. I have "learning" on my one blue mage. When the monster does transfusion, there is no indication that it is casting it on any pen person.
Blue spells are learned at the end of combat. You can usually tell if a character with Learning got hit like you expected, but for Transfusion it's rather subtle. You have to keep an eye on your HP/MP scores.