Wesker would probably always be the most evil being anyone could meet. The strongest, the smartest, he was the epitome of evil.
But he couldn't be that for his daughter. Sure, one day, he'd teach you his ways. But you were merely a toddler right now, and he needed to learn how to be nice and softer with you. You being scared of him was no good.
He was currently doing blood tests on himself. You know, just to see how his body is holding up. Then he heard a loud bang, and your loud cries. He pretty much, sprinted very quick. Just upstairs to you in the living room.
You were fine. He saw the fallen bookshelf, and assumed you just got scared. Perfect! Well, not perfect, but he needed anmoment to gain your trust. This was it! He just needed to comfort you and he'd have your full trust.
He thought his actions over before kneeling and picking you up. He held you, and pretty awkwardly patted your back.