Are you asking how a native would refer to individual kana? It's a bit like how you'd say "the letter A" in English. So, ひらがなの「あ」, カタカナの「ノ」, ひらがな「ひ」, カタカナ「ミ」, etc.
You can also just say あ、い、こ、な、etc. Those are technically the names of the characters. It's pretty much the same as when someone says "A", "B", etc.
Is that what you're asking? If not, could you elaborate?
Edit: This is the Cyrillic letter "я". You can write it (in Latin letters) however you want in English, but for us it's just "я". It's the same thing with a Japanese character like な. It's not really that they have "names" in English, it's just how English represents them. And the reason for that is that otherwise you won't know how to pronounce them.
( I'm avoiding any linguistics, since I think an intuitive explanation is more than enough )
Like, the English name for "я" might be "ya" / "ja", but for me it's just "я" :D
Update: I forgot English has a strong disconnect between how letters are pronounced and their "names". Japanese doesn't have that. な is just "na". It doesn't really have a separate "name".
My native language is (mostly) like that too. The "names" we use for most letters are the same as the sounds they make.
