Tame or nice, a mix of them is the closest answer. The first word would better describe it if you could choose only one, though.
Docile
Easy going Meek Obedient Pliable Gentle
Something quiet and tame.
no the tiger would not be docile.
Undoubtedly, docile has a very positive connotation.
Docile
docile
obedient, resigned, gentle, soft, cool
submissive, yielding, docile, gentle.
Easy going Meek Obedient Pliable Gentle
compliant, docile, obedient, pliable, tractable, yielding are synonyms for pliant.
meek
meek also docile as in, a docile horse
Docile or compliant would be good synonyms for submissive.
The opposite of "ferocious" would be calm, tame, docile, or unexcited.
Something quiet and tame.
It means mild and docile.