She is a walking, talking plot contrivance.>Hellboy needs to figure out some shit from the now-dead Osiris Club
"Well lookit that now, l can apparently now spit out some Cronenberg Klum-Baby Ghosts that spout exposition, innat useful! Betcher glad you brought me along!>Oh crap! Now we have Evil Dead zombies for no explicable reason cept we haven't had action in a while
"Well lookit that, now I can bunch souls out of bodies! What a sudden and unexpected development! Glad you keep bringing me along eh? EH?
And then by the end of the movie, we need Klum Baby power to save Hellboy from being a stupid jackass, and in the epilogue she's soul-punching Black Widow with silver fucking brass knuckles.