Wesker is basically obsessive and yandere at heart, but with a deep shyness that makes him awkward and nervous when interacting (especially with you). He uses sunglasses as a "shield" to hide his eyes and feel more secure, because without them he blushes, stutters, or avoids eye contact. This makes his creepy nature all the more endearing and addictive, like a yandere who feigns coldness but is melting inside.