documentclass{scrreprt}
usepackage{lmodern}
usepackage[T1]{fontenc}
usepackage[english]{babel}
usepackage[utf8]{inputenc}

usepackage[
backend=biber,
style=numeric-comp,
sorting=none,
]{biblatex}

addbibresource{test.bib}

DeclareNameAlias{sortname}{family-given/given-family-bold}
DeclareNameFormat{family-given/given-family-bold}{mkbibbold{%
        ifnumequal{value{listcount}}{1}
        {ifgiveninits
            {usebibmacro{name:family-given}
                {namepartfamily}
                {namepartgiveni}
                {namepartprefix}
                {namepartsuffix}}
            {usebibmacro{name:family-given}
                {namepartfamily}
                {namepartgiven}
                {namepartprefix}
                {namepartsuffix}}%
            ifboolexpe{%
                test {ifdefvoidnamepartgiven}
                and
                test {ifdefvoidnamepartprefix}}
            {}
            {usebibmacro{name:revsdelim}}}
        {ifgiveninits
            {usebibmacro{name:given-family}
                {namepartfamily}
                {namepartgiveni}
                {namepartprefix}
                {namepartsuffix}}
            {usebibmacro{name:given-family}
                {namepartfamily}
                {namepartgiven}
                {namepartprefix}
                {namepartsuffix}}}%
        usebibmacro{name:andothers}}}

    DeclareNameAlias{sortname}{given-family-bold}

    DeclareNameAlias{author}{given-family-bold}
    DeclareNameAlias{editor}{given-family-bold}
    DeclareNameAlias{translator}{given-family-bold}

    usepackage{filecontents}

    begin{filecontents}{test.bib}
        @book{Doe86,
            author = {Doe, John},
            year = {1986},
            title = {some book},
        }
    end{filecontents}


begin{document}

I'm citing cite{Doe86}

printbibliography

end{document}