node positioning in tcolorbox

[elfin drift]

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[main remnant]

Hi @narrow wedge, I think you can try positioning library from TikZ

\tcbset{frogbox/.style = {
        enhanced,
        enlarge top by = 3em,
        overlay = {\node[anchor = west, yshift=1.5em] at (frame.north west){\includegraphics[width=3em]{leo.png}};}
    }
}

\begin{tcolorbox}[frogbox]
    Hello, Leo!
\end{tcolorbox}

[main remnant]

and then in your node options use yshift to shift it up

I found that the enlarge top by value should equal the size of the image, and the yshift should be half of that value

For it to look reasonable