I've given personalities to the pets my LM Lilleduil (also on Landroval) has, but they mostly come into play in her stories, as she generally dismisses them when in a town. Her bear, Roschhanar, is one of her oldest friends. Her Dusky Sabre Cat, Tinnugost, she picked up in Angmar and he has been with her ever since, as his mate and cubs were killed by men. Lintroval, the Eagle, is a wise counsellor, as is Myrnith her raven. Tinnufaron and her other lynxes are faithful, silent companions. Norngaladh, Gondrafn and Aegistill her boggies, are all cheerful, chortling killers.
I figure their relationships will develop even further the longer I play her. And she always thanks or pets them before dismissing them. But I've not actually emoted with them in a formal RP situation yet.
Landroval-Alphriel (Champion/78), Talya (Guardian/74), Cilarien (Champion/49), Tilluin (Minstrel/48), Morrollan (Captain/40), Nimthiel (Hunter/41)-, Mellanduil (Warden/33) Laurelin-Lilleduil (LM/105), Eirallyn (Warden/105), Faelarin (Minstrel/72), Cattigus (Burglar/34), Celebhair (Hunter/63), Sithora (Beorning/28)