What does Expressionless Face look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add Expressionless Face?

HTC first drew Expressionless Face in Sense 7, released March 30, 2015.

HTC Corporation has shipped 2 versions of Expressionless Face. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn Expressionless Face 2 times. Every revision HTC has shipped is below, newest first.

What does Expressionless Face look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add Expressionless Face?: HTC first drew Expressionless Face in Sense 7, released March 30, 2015.
How many times has HTC redrawn Expressionless Face?: HTC Corporation has shipped 2 versions of Expressionless Face. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.