Those levels are very nice. I went through the Morlia Gallery and I had:

Cless: Level 81 (*feeds stat-increasing herbs*)
Chester: Level 75
Suzu: Level 63 (^_^)
Mint: Level 78

The maximum level is 99, though. Only later Tales games have the 250 cap.

According the the bestiary, it only gives about 800 experience points and Gald. It isn't worth it to kill it anyway, and I only vaguely have heard of the Magic Tablets.