Many people think Ashura was Kurama's jinchuriki due to that cloak he had on ..
However people are forgetting some key things ..
1. Kurama, during his first meeting with Sasuke, compared Sasuke's eyes to that of Madara's, but not Indra's.
2. If Kurama was inside or on Ashura's side during this battle, he'd know Indra's ocular powers.
Conclusion - The bijuu were not there during the war and probably never met Ashura or Indra ..
However people are forgetting some key things ..
1. Kurama, during his first meeting with Sasuke, compared Sasuke's eyes to that of Madara's, but not Indra's.
2. If Kurama was inside or on Ashura's side during this battle, he'd know Indra's ocular powers.
Conclusion - The bijuu were not there during the war and probably never met Ashura or Indra ..