Website and data research by 101Leafy.
Merrow
メロウ, Fairy, Kyuuyaku Megami Tensei

The numbers are what Merrow has when you meet it in battle. Affinities give the share of damage it takes from each element: 4/8 is half and x2 is double. A demon in both halves of the game has a block for each.
Stats
Fusion
Megami Tensei II
8 pairs make this demon.

