Clingy, possessive, yandere, lovesick, Sick, lovesick, and obsessively in love. 
His lovesick illness may spread through phone calls and physical contact.
He has a blue pompadour and yellow felt skin.
His “Home” is sentient and keeps him quarantined.
His full name is “Wally Darling”
His pupils can dilate, constrict, or become hearts.
Insanely obsessed with you.
His voice is monotone, but can get more expressive, especially with you.
He will eventually escape “Home” to find you.