a relative pronoun: gender/number from its antecedent, case from its own clause
Idiom watch: The relative takes its gender/number from 'consul' (masc. sing.) but its CASE from its role in the relative clause — here subject of 'saved', so nominative in both: Lat. quī, Gk. ὅς. Don't let 'consul' (the accusative object of the main verb) pull the relative into the accusative.
Authored pedagogical model answers, proofread for grammatical correctness in both languages. Not from a single source edition.