Arakune is supersad about this matchup. Even VER have serious problems with Rachel.
And some random things about this matchup:
-poles is really painful for Arakune, sword iris disables his teleports in neutral game
-his AA works very bad in this matchup. You can use 1D/2D/3D if he does 5C and block/punish it. Don't use j.2C, you will be cursed. His 2B works pretty good, it low profiles most jump ins, but it's hard to use on Rachel with wind. 5A is nothing special, but 70% curse if you eat this as AA.
-his reversal super/CA are very good and superfast. And he can combo CA into 100% curse when he have 100% heat. CA have short range and works only if you on ground.
-6C can be used like Noels 2D, but isn't retarded.
-run away when you cursed, this makes arakunes salty:'(