dispassionate

Synonyms: abstract aloof calm candid cold-blooded cold-fish collected composed cool cool cat couldn’t care less detached disinterested fair iceberg impersonal imperturbable indifferent judicial just laid back moderate neutral nondiscriminatory nonpartisan objective poker-faced quiet serene sober temperate tough unbiased unemotional unexcitable unexcited unflappable uninvolved unmoved unprejudiced unruffled

Antonyms: biased emotional excited feeling involved moved partial passionate prejudiced subjective