Allophones: /e/ as [j] , /kj/ as [k͡xj]?


I noticed a few pronunciations which surprised me.

In [this clip](https://youtu.be/MQmJYGBpBXM?t=20m8s), and in a lot of other
movies, 返して, /kaeɕ.te/ sounds like [kaɪ̯ɕ.te] to me. Is there a rule?: /e/ →
[ɪ̯] / a_ . If so: Is it dialectal, slang or standard pronunciation?

It sounds to me like the name 桔梗, ききょう, /ki.kjoː/, is consistently pronounced
[kʰi.k͡xjoː] in [Inuyasha](https://youtu.be/4Iw8G4aKtRk?t=37s). Rule: /kj/ →
[k͡xj] / i_ ???

