In the さしすせそ series, し is an exceptions to the pattern.
Is ''she'' easier to pronounce than ''see'' or why does Japanese have this feature?
This comes down to the biomechanics of pronunciation. It's the same reason we say things like "tenshun" in English for the word tension.
The specific phenomenon is called "palatalization". There are two articles ...
△ さんかく over internet could mean such thing as san is cool/handsome people write a name and put the △ in the end bcs sankaku could be . san ga kakkee (“_-san is cool/handsome”)with a little imagination so Name△ instead of writing it all