Does the feats attached to a character count to Elsa´s [i]MONSTER HUNTER Elsa Bloodstone deals penetrating damage to characters over 250 points. She modifies her attack value by +2 when attacking characters that possess "Giant Symbol", "Colossal Symbol", or the Monster keyword.?
Example: I attack a Red Hulk (220 pts) with fortitude (25 pts), Elsa would deals penetrating damage?

No, attaching a feat does not add to the character's point value. Red Hulk would still be 220 no matter how many feats you have on him and he would not be affected by Elsa's trait.

No, you wouldn't.
Feats don't add to a character's point total for any purposes. They only add to the build total.
Also, your example is still only 245 points anyway.