# MATL, 5 bytes

    YNVH)

[**Try it Online**](http://matl.tryitonline.net/#code=WU5WSCk&input=)

**Explanation**

    YN      % Creates a NaN value (not a number)
    V       % Convert it to a string
    H)      % Grab the second letter ('a')
            % Implicitly display the result

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My original answer was the straight forward approach using the pre-defined literal `lY2` which yields `'A'...'Z'` and then selecting the first element, `'A'`.

    lY2l)