Humbert: ISFP. .. . Far too self i mportant about looks, style to be INFP, lacks empathy towards both Charlotte and Dolores, could be explained by Narcissistic Personality Disorder, but he's so immersed in the sensual, the stylish, the intellectually pretentious, he actually has Lolita jerk him off while he's watching playgrounds, he's far too immersed in the sensory experience. Instead of being satisfied by memoirs of Lola in socks, he seeks out new positions, experiences, even new "nymphets" ...constantly remarks on the animal sexuality of others, Lola, her mother, the neighbor, Lolas new man, all the women who supposedly want him. He is a hilariously unhealthy ISFP, who has an Fi moral reckoning at the end, none the less at the sound of children playing, not a fantasy, idea or artwork.
Lolita: definitely Se dom, but I considered her more ESFP
Charlotte: ESFJ is good, even ENFJ. ..She's messy and impossibly romantic...yeah ENFJ is better for Charlotte, her romantic delusion, suicide, power play with her own daughter...Charlotte is unusual, frustrated, ESFJ doesn't make sense.
I don't speculate upon Nabokov, don't know him well enough, would have to read a lot more.