As soon as the word Loki leaves Warlock's mouth Grimnir springs into action, tossing his spear just by the person's head to get their attention
Never say the trickster's name. Thor is fine, but never the trickster. Its practically asking for trouble, not like he needs an invitation.
With that warning issued, he bows apologetically to Homura
My apologies, some people have no awareness. Anyways, I haven't the slightest idea what that Persona creature really is, but your natural affinities are your natural affinities.
Grimnir steps off to the side and holds out his arm, letting a wave of motion travel down it from the tips of his fingers back to his body
Most forms of magic don't really care whether or not it works with your style, if wind is what comes when you try channeling yourself, then wind you have. Of course, the Tempest is a technique that takes quite some time, but if you'd like I can show a much smaller example at the moment, though how that creature of yours would work for it I haven't the slightest idea.
Finally, Grimnir begins making long, dancelike motions on the pond, rather similar to what he had been doing during their fight
One important thing to note is awareness, you need to know how the wind flows naturally in order to best take advantage of it when generated yourself. Air cannot move through solid objects, so every solid object on you is to be treated like a barrier, to part the wind and bring it rushing back. This rushing moment is what can build and build into a worthy gust. Your reckless flinging might be faster, but has much less of an impact than a more artful manner of using it.
Grimnir nods to Madoka and stops his little demonstration
Of course I protect the innocents, most commonly women and children. Though most Asgardians don't actually do much these days, I at the very least still have my word to uphold.
Grimnir chuckles at her last statement
Worry not fair Madoka, as long as I'm around you need not lift a finger. Why, imagine how shamed I would be if I requested the assistance of the very lives I'm supposed to protect? As such, I hope not to see any of you on a true field of battle, but, I understand bravery. Its not like I'm going to stop you from seeking an honorable and heroic end, wouldn't mind one myself honestly