Odou and Jack I can tell, but the rest I can't tell other than that they're all contestants of the 168th Tenno Sho... Perhaps the gray to the left is Gaia Force, and the horse next to Equinox is Prognosis I guess...???

Character correspondence:
For Danon Beluga and Gaia Force
For Justin Palace
For Do Deuce and Equinox
For Jack d'Or
For Stars on Earth
For Prognosis

Jnglmpera said:

...they're all contestants of the 168th Tenno Sho...

Yes, they were all intended to compete in the Tenno Sho. Stars on Earth withdrew 5 days before the race.

lyagushka said:

Character correspondence:
For Danon Beluga and Gaia Force
For Justin Palace
For Do Deuce and Equinox
For Jack d'Or
For Stars on Earth
For Prognosis

Yes, they were all intended to compete in the Tenno Sho. Stars on Earth withdrew 5 days before the race.

Thanks for the confirmation :)