Going with the Ghibli thing L would be Zeniba. Warm and nurturing but has a serious edge, where necessary. Also there's an extraordinarily large squirrel that lives in her yard that we leave snacks for sometimes.

M.... not sure and this is sad to me. My cartoon knowledge is extremely limited.

Maybe Totoro? Like in the sense that he's squishy and much, much, much larger than me? And is seeing me through a sort of parental void situation?