If Mitsuki is somehow related to Toneri ...

[Reviewing Logic]

Check out Kishimoto's drawing for team Konohamaru with those cloaks.

His eyes are yellow

oh yeah you're right lol

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forgot the whole things engulfed him in chakra as well

he is completely blue like tenseigan chakra mode

 

[Made in Heaven]

It's basically safe to say at this point that Mitsuki is Toneri's clone. This is almost the same case with Minato being Naruto's dad before it was actually revealed. It's so obvious.