It is made clear in several episodes that Ferb has a crush on Dr. Doofenshmirtz's daughter, Vanessa as he is usually sent into a trance-like fantasy state whenever he is close with her. He has gone out of his way a few times to give her assistance, both emotionally and to save her life. Whether Vanessa has any romantic feelings for him is unclear, due to several factors including the fact that she has a boyfriend, is several years older than Ferb, and the two have very limited on-screen interaction. However, the two seem to have a good relationship regardless. Ferb also cares for Vanessa's happiness with boyfriends, like Monty when he sang Vampire Queens Love Pimpernels for them to dance together in Druselsteinoween.