Sometimes a person is unlucky enough to get the most important lessons straight after the birth, although Levi considered anything which helped him survive as an advantage.
Having cool, calm set of mind, not being prone to panicking and being overall a well-made predator would forever stay 'fucking useful things'.
The intrinsic, inherited knowledge of what is right to do and what is right for him sure was another helpful lifesaver.
So when faced with a bolt of knowledge that apparently he wasn't immune to certain someone's presence and needed to make certain his company was the most desired one, Levi acted as he always did - he marched into that battle with canines and talons bared, deadly, precise.
And woe is anyone who dares not to yield!
Who the hell are writing about, people? A 19-year old girl? "His cobalt orbs dimmed at the thought of losing…"
Bleh