confiding
unsuspecting
unsuspicious
confident
credent
faithful
fiducial
questionless
reliant
trusting
trustworthy
trusty
undoubting
unquestioning
affable
affectionate
appreciative
childlike
compassionate
credulous
filial
fraternal
guileless
ingenuous
kind-hearted
magnanimous
obedient
reverent
sweet-tempered
unselfish
distrustful
doubtful
suspicious