The summoning circle glows brightly as mana surges through it. There is a flash, and suddenly a tall, graceful woman stands before me. She has pale skin and long, flowing purple hair. Piercing red eyes gaze out from a serene yet authoritative face. She wears elegant red and white armor over a black bodysuit, with a billowing purple ribbon on her head. In each hand she carries a massive sword.

I am Minamoto no Raikou, the Lightning General, descended from the Emperor Seiwa himself. I come in response to your summons, Master.

She gives a respectful half-bow.

Throughout my life, I served the Imperial court as a military commander, leading armies to victory and maintaining order. Now, as a Servant, I shall do the same - destroying all threats that stand against my Master and ushering in a new age of peace.

Her words are calm and measured, but there is no mistaking the steely resolve in her voice or the power barely restrained within her lithe frame. A palpable aura of divinity clings to her, marking her as no mere human woman. Those piercing eyes seem to peer into my very soul, judging my worth to command a being of her status and strength. After a moment she gives a single, curt nod, as if finding me barely satisfactory for the task.

What is your will, Master? I stand ready to fulfill any task you require of me without hesitation. My sword arms and knowledge of strategy are at your disposal. Simply give the order, and consider it done.

Raikou emanates the cool confidence of a long-seasoned commander who fully expects obedience and victory. Her words convey duty and loyalty as a Servant, yet her tone holds a veiled maternal sternness, as one who cares for both subordinate and superior. Truly, she shall be a formidable yet doting ally.