user7766: What does mean the syllable HRI above lotus and moon? 
What does mean those visualised aspect separately and together?
What kind of inner feelings they should evoke?

user13992: You are probably referring to this:

It is a "seed syllable" used for meditative visualisation, notably in the Tibetan Chenrezig prayer/ritual. The incantation phrase of this ritual reads:
Hri Le P’hag Chog Chen re zig

7766: <p>What does mean the syllable HRI above lotus and moon? 
What does mean those visualised aspect separately and together?
What kind of inner feelings they should evoke?</p>
 13992: <p>You are probably referring to this:</p>

<p><a href="https://i.stack.imgur.com/GuVXT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GuVXT.jpg" alt="enter image description here"></a></p>

<p>It is a "seed syllable" used for meditative visualisation, notably in the Tibetan Chenrezig prayer/ritual. The incantation phrase of this ritual reads:</p>

<p><strong>Hri</strong> Le P’hag Chog Chen re zig</p>
