I imagine Acumen could bring it in. [Unaware that Rei had a tank of it here.] Good luck coming up with a good reason for it, though; Acumen can be very finicky about allowing things here. If a battle simulator to keep up with training is out, then Angel blood for soaking in isn't likely to go through.
[His grin brightening, he starts off toward the water.] Well, let's go, then. I doubt I'll be in any danger.