Welcome @Nathalia It is a rule of this forum for all new members to properly introduce themselves so PLEASE CLICK ON THE IMAGE BELOW and tell us about yourself and any experience you may have in magick, such as what you practice, how long you have practiced, areas of interest, etc:
Lucifer and bune 
Lady Agrat bat mahlat ( not for beginners)
Requires , more energy than normal demons or demons who are low in rank , but if you able to make a bond with her , she is the nicest one I’ve ever met , sometimes I never had to ask her to do this or that , she knows what’s good for me
I find King Paimon to be very friendly.
For me, Bael and Agares come up tops as being super nice and approachable.