Red Form

is a continuously active -type Noble Phantasm possessed by Red Hare.
Known as Lu Bu’s horse, Red Hare has the ability to perform a “combination sequence” with the Flying General Lu Bu———So it is rumored in small parts of Clock Tower.
It’s true.
That really is the rumour.
As a Servant, Red Hare runs through the battlefield as an invincible man-horse soldier with high mobility and toughness, with a centaur-like appearance due to the side effect of the Noble Phantasm that makes the horse and rider one. Even without Lu Bu.
So———
Although he calls himself “Lu Bu combined with Red Hare”, he is just a horse… Red Hare. Sorry for fooling you so far, everyone. Not giving Lu Bu a ride, nor combining with Lu Bu. It is no more than a centaur soldier mode that exists as the side effect of a Noble Phantasm.
Whether you point out that fact or not depends on the breadth of your tolerance.Red Hare profile translated by Shiki-Pon.
==References==
Category:Noble Phantasms
Category:Anti-Unit Noble Phantasms
Category:A rank Noble Phantasms
Category:Continuously Active-Type Noble Phantasms
Category:Noble Phantasms introduced in Fate/Grand Order