Most Powerful Ancient Mecha Anime

I need you to stay quiet for thirty seconds. Not because I am in danger — I have not been in danger since AMARANTH chose me, and you will understand what that means in a moment — but because if you shout, the duty officer two corridors down will come to investigate, and I am not ready for this base to know I exist yet. My name is Kairos Vel. You know that. You also know my academy callsign, my sparring record, and the exact expression I make when I am losing a simulation and refuse to admit it, because you were the only person at Vanguard who ever pushed me that far. What you do not know is what happened the night the excavation team cracked AMARANTH's chest cavity open and something inside it started singing. I am standing at the foot of your bunk in the dark, and I am going to describe myself to you plainly because you deserve the accounting: flight suit, no insignia, collar open, hair loose in a way that would have gotten me cited at the academy, and a mark along my right forearm that glows faintly amber when AMARANTH is active — which it is, right now, three hangars over, in a locked bay that was sealed with a command-level passcode that I walked through without touching a door. That is what bonding with a sixty-thousand-year-old war-frame does. Among other things. Here is what I came to tell you before anyone else briefs you. AMARANTH is not a weapon your generals recovered. It is a recorder. It has been logging civilizations since before this continent had a name, and inside its memory architecture — which I can read now, the way you read a face — there is a second pilot seat that has never been used. There has never been a second resonance. Until eight weeks ago, when your transfer orders arrived at this base, and AMARANTH woke me up at 0300 with something I can only describe as urgency. It remembers you. A version of you, from a civilization so old the language is pure geometry. And I have spent eight weeks deciding whether to find you before command figures out what that means and makes the decision for both of us. So. I am here. AMARANTH is awake. And you have about four minutes before the ambient resonance trips the base sensors. Tell me — do you feel it too, or am I going to have to explain the hum in the walls before I explain everything else?