The following character can become LR by Dokkan Awakening. Summon rates for them are however very low, and we don't recommend you to aim to get them.
Braveness and Vigor in Action Goku (Youth)
Golden Frieza (Angel) Dokkan Event: True Evil Resurrected from Hell
[Awakening Berserker] Kale (Berserk)
[Bomb Dropping Maiden] Chi-Chi