This coffee with これ

Vocabulary Explanation: This with これ

Cocoa tries to show off her ability to recognize the three types of coffee Chino made for her.

ココア:: 「この上品(じょうひん)な香(かお)り！これがブルーマウンテンかー」; “What a refined aroma! So this is Blue Mountain, huh?”
チノ:: 「いいえコロンビアです」; “No, that's Columbian.”

Key Points

1これ points to the coffee Cocoa is holding

これ means “this” because the cup of coffee is on Cocoa’s side of the conversation, close to her as the speaker.

2この modifies 香(かお)り

この上品(じょうひん)な香(かお)り means “this refined aroma”; この must attach directly to a noun, here 香(かお)り.

3これが marks the item being identified

In これがブルーマウンテン, が singles out this coffee as the thing Cocoa is trying to identify.

4かー shows Cocoa’s drawn-out realization or guess

The ending かー gives the line a casual, drawn-out feel, like “So this is Blue Mountain, huh.”
Chino’s immediate いいえ shows that Cocoa sounded confident enough to be corrected.