Hatori Sohma

From Animepedia

When Akito decides that a person is to have their memory erased in order to protect the Sohma secret, Hatori is the man to do it. The Sohma curse has caused Hatori much pain in the past and only wishes that anyone outside the family stay away from the secret that could ruin their life. Naturally suspicious of others, Hatori's zodiac animal is the dragon (seahorse).