Did Kakashi's sharingan evolve because Obito was watching?


Both Kakashi and Obito awaken their Mangekyou at the same time as told in this
question [When did Kakashi and Obito awaken their Mangekyou
Sharingan?](https://anime.stackexchange.com/questions/4484/when-did-kakashi-
and-obito-awaken-their-mangekyou-sharingan) The sharingan Kakashi owns
originally came from Obito, so is it due to Obito also being there at the
moment Rin died that Kakashi's Mangekyou also awakend? Or asked in a different
way. Would Kakashi have been able to awaken the Mangekyou without Obito being
there?




Interesting question with no definite answer, so I'll post my 2c here.

The Mangekyou Sharingan is activated by the immense grief caused by killing
the person closest to you. However, it seems like you don't actually have to
kill him, but witnessing his death is enough.

For example, Itachi did not actually kill Shisui, rather, he watched him
commit suicide (filler).

I believe that both of them awakened their Mangekyou Sharingans separately,
and because they were both at the scene when it happened, it happened
simultaneously.




Interesting question with no definite answer, so I'll post my 2c here.

The Mangekyou Sharingan is activated by the immense grief caused by killing
the person closest to you. However, it seems like you don't actually have to
kill him, but witnessing his death is enough.

For example, Itachi did not actually kill Shisui, rather, he watched him
commit suicide (filler).

I believe that both of them awakened their Mangekyou Sharingans separately,
and because they were both at the scene when it happened, it happened
simultaneously.

