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Medusa's Shadow
メデューサのかげ, Foul, Kyuuyaku Megami Tensei

The numbers are what Medusa's Shadow 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
Found in
Story fights
Megami Tensei, 2F, Square 0, 23
Megami Tensei, 3F, Square 124, 27
Megami Tensei, 4F, Square 101, 45

