Hey i just found out for you,
Fuse Nimble Cerberus and an Angel,
You can get a Nimble Cerberus from the mount teacher (the guy on the Cerberus) in Shinjuku Babel (The mount teacher is one of the first people you see when you go into Babel from Nakano),
You can get an angel in Suginami Tunnels(Bronze) - iirc you just need to use talk untill it gives you an egg,
The skills it gave me did include a rez and Dia (a singular heal) but no media unfortunatly.
Hope this is ok.