ケイトは、これを最後に永久にここを離れていった。

condemned person; prisoner

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

this (indicating an item near the speaker, the action of the speaker, or the current topic); this person (usu. indicating someone in one's in-group); now; here; I (me); certainly

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

last; end; conclusion; latest; most recent; no sooner than; right after (often having negative consequences); one's final moments

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

eternity; perpetuity; immortality; Eikyuu era (1113.7.13-1118.4.3)

here (place physically close to the speaker, place pointed by the speaker while explaining); this place; these last (followed by a duration noun and a past sentence: time period before the present time of the speaker); these next ... (followed by a duration noun and a non past sentence: time period after the present time of the speaker); the next ...

to be separated; to be apart; to be distant; to leave; to go away; to leave (a job, etc.); to quit; to give up; to lose connection with; to drift away from