What's the first anime to have different versions of theme songs by different MCs' voice actors?


Some anime have different versions of theme songs (OPs or EDs) by different
MCs' voice actors. For example, _Blade Dance of the Elementalers_ has
different versions of EDs by each of its female MCs,
[Est](https://www.youtube.com/watch?v=LQ0sIvxSlO8),
[Claire](https://www.youtube.com/watch?v=57KlYoS0xMM),
[Ellis](https://www.youtube.com/watch?v=QkLUuz0FaUg),
[Fianna](https://www.youtube.com/watch?v=wDrq_2IhCfw) and
[Rinslet](https://www.youtube.com/watch?v=QMZTkoSBJBQ).

What's the first anime to have different versions of OPs or EDs by all of its
**MCs** , **male MCs** or **female MCs**?




The first one that comes to mind is **Sakura Taisen: Gouka Kenran (1999)**.  
You can listen to the different versions
[here](https://openings.moe/list/?s=sakura%20taisen%20Gouka).

There might be earlier examples, though.

