The sketch below has a newcommand to insert a TikZ code to draw an Among us Crewmate.

This is not a fully functional design, but there are options of colors and two emotions: angry and very angry.

This is just a kick start in order to (one day) become something as good as other packages.

documentclass{article}
usepackage{tikz}
usepackage{xifthen}

newcommand{FHZamongUs}[3][]{%
begin{tikzpicture}[every path/.style={very thick}]
  % Backpack
  draw[fill=#2, rounded corners = 3mm] (1,1) rectangle ++(0.8,3.2);
  % Body
  draw[fill=#2, rounded corners = 3mm] (1.5,0) -- (1.5,5)
  arc (124.8074:103.8454:5) arc (80.6307:58.1808:5)-- (5,0) -- (3.7,0)
  {[rounded corners = 0mm] -- (3.7,1) coordinate(A) -- (2.7,1)}
  -- (2.7,0) -- cycle;
  % Eyes
  ifthenelse{equal{#1}{angry}}
    {draw[fill=#3]  plot[smooth cycle, tension=.7] coordinates
      {(4.3,4.7) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};}
    {ifthenelse{equal{#1}{very angry}}
      {draw[fill=#3]  plot[smooth cycle, tension=.7] coordinates
        {(4.4,4.3) (5.2,4.6) (5.2,3.5) (4.2,3.6) (3.1,3.5) (3.1,4.7)};}
      {draw[fill=#3]  plot[smooth cycle, tension=.7] coordinates
        {(4.3,4.9) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};}
    }
  % Leg detail
  draw plot[smooth, tension=.7] coordinates {(A) (3.9,1) (4.2,1.1)};
end{tikzpicture}
}

begin{document}
  FHZamongUs{white}{white}
  FHZamongUs[angry]{yellow}{white}
  FHZamongUs[very angry]{red}{cyan}
end{document}

---

Update

New Styles with shadows

Using the idea of a scope inside a newcommand from this answer and the shade style from this video, I updated the previous drawing into a style spliting each part and creating newcommands to combine them.

It is still not the best approach to create shades but the result and new implementation are much better than the previous attempt.

I still intend to add a hand, create the emotions in the shade-ish style and update it as a package in CTAN.

The FHZ-amongUs.sty file:

NeedsTeXFormat{LaTeX2e}[1994/06/01]
ProvidesPackage{FHZ-amongUs}[2020-10-18 Custom Package for my AmongUs sketch]

RequirePackage{tikz}
RequirePackage{xifthen}
usetikzlibrary{calc}
usetikzlibrary{shadings}

%  ======================================= Style 0 -- Original Idea
newcommand{FHZamongUsOriginal}[3][]{%
begin{tikzpicture}[every path/.style={very thick}]
  % Backpack
  draw[fill=#2, rounded corners = 3mm] (1,1) rectangle ++(0.8,3.2);
  % Body
  draw[fill=#2, rounded corners = 3mm] (1.5,0) -- (1.5,5)
  arc (124.8074:103.8454:5) arc (80.6307:58.1808:5)-- (5,0) -- (3.7,0)
  {[rounded corners = 0mm] -- (3.7,1) coordinate(A) -- (2.7,1)}
  -- (2.7,0) -- cycle;
  % Eyes
  ifthenelse{equal{#1}{angry}}
    {draw[fill=#3]  plot[smooth cycle, tension=.7] coordinates
      {(4.3,4.7) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};}
    {ifthenelse{equal{#1}{very angry}}
      {draw[fill=#3]  plot[smooth cycle, tension=.7] coordinates
        {(4.4,4.3) (5.2,4.6) (5.2,3.5) (4.2,3.6) (3.1,3.5) (3.1,4.7)};}
      {draw[fill=#3]  plot[smooth cycle, tension=.7] coordinates
        {(4.3,4.9) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};}
    }
  % Leg detail
  draw plot[smooth, tension=.7] coordinates {(A) (3.9,1) (4.2,1.1)};
end{tikzpicture}
}
%  =======================================

%  ======================================= Style I -- Manual Shade
newcommand{FHZamongUsPackbackI}[2][]{
  begin{scope}[#1]
    fill[#2, rounded corners = 3mm] (1,1) coordinate(R1) rectangle ++(0.8,3.2) coordinate(R2);
    fill[black!30!#2, rounded corners = 3mm] (R1) -| ($(R2)+(0,-0.2)$)
    {[sharp corners]-- (1,3.5)}
    -- cycle;
    draw[rounded corners = 3mm] (1,1) rectangle ++(0.8,3.2);
  end{scope}
}
newcommand{FHZamongUsBodyI}[2][]{
  begin{scope}[#1]
    fill[black!30!#2, rounded corners = 3mm] (1.5,0) -- (1.5,5)
    arc (124.8074:103.8454:5) arc (80.6307:58.1808:5)-- (5,0) -- (3.7,0)
    {[rounded corners = 0mm] -- (3.7,1) -- (2.7,1)}
    -- (2.7,0) -- cycle;
    fill[#2] plot[smooth, tension=.7]
    coordinates {(1.9436,5.2721) (2.0594,2.4257) (2.9347,1.3971)
      (4.4826,1.7343) (4.9666,3.0446) (4.9686,4.0294)
      (4.9797,4.7974) (4.6523,5.2436) (3.4183,5.6907) (2.5265,5.5757)};
    draw[rounded corners = 3mm] (1.5,0) -- (1.5,5)
    arc (124.8074:103.8454:5) arc (80.6307:58.1808:5)-- (5,0) -- (3.7,0)
    {[sharp corners] -- (3.7,1) coordinate(A) -- (2.7,1)}
    -- (2.7,0) -- cycle;
    % Leg detail
    draw plot[smooth, tension=.7] coordinates {(A) (3.9,1) (4.2,1.1)};
  end{scope}
}
newcommand{FHZamongUsEyesI}[2][]{
  begin{scope}[#1]
    fill[#2] plot[smooth cycle, tension=.7] coordinates
    {(4.3,4.9) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};
    fill[black!50!#2]
    {plot[smooth, tension=.7] coordinates {(3.1,4.7) (3.2964,4.8157) (3.2633,4.3111) (3.4423,3.8301)
        (3.794,3.6464) (4.3087,3.5904) (4.9485,3.5904) (5.2338,3.5723) (4.7492,3.2515) (3.5071,3.2661) (3.0208,3.6849) (2.9691,4.3844)}};
    draw plot[smooth cycle, tension=.7] coordinates
    {(4.3,4.9) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};
    fill[white] plot[smooth cycle, tension=0.7]
    coordinates {(4.3069,4.7316) (4.581,4.7457) (4.8219,4.7029) (4.9541,4.5887) (4.7168,4.5055) (4.3152,4.525) (4.168,4.6295)};
  end{scope}
}
newcommand{FHZamongUsI}[3][]{
  FHZamongUsPackbackI[#1]{#2};
  FHZamongUsBodyI[#1]{#2};
  FHZamongUsEyesI[#1]{#3};
}
%  =======================================

%  ======================================= Style II -- shade
newcommand{FHZamongUsPackbackII}[2][]{
  begin{scope}[#1]
    draw[shade, top color=#2, bottom color=#2!5!black, middle color=#2, rounded corners = 3mm]
    (1,1) rectangle ++(0.8,3.2);
  end{scope}
}
newcommand{FHZamongUsBodyII}[2][]{
  begin{scope}[#1]
    draw[shade, top color=#2, bottom color=#2!5!black, middle color=#2,
    rounded corners = 3mm]
    (1.5,0) -- (1.5,5)
    arc (124.8074:103.8454:5) arc (80.6307:58.1808:5)-- (5,0) -- (3.7,0)
    {[rounded corners = 0mm] -- (3.7,1) coordinate(A) -- (2.7,1)}
    -- (2.7,0) -- cycle;
    % Leg detail
    draw plot[smooth, tension=.7] coordinates {(A) (3.9,1) (4.2,1.1)};
  end{scope}
}
newcommand{FHZamongUsEyesII}[2][]{
  begin{scope}[#1]
    draw[shade, inner color=white!95!black, outer color=#2]  plot[smooth cycle, tension=.7] coordinates
    {(4.3,4.9) (5.2,4.6) (5.2,3.5) (4.2,3.2) (3.1,3.5) (3.1,4.7)};
  end{scope}
}
newcommand{FHZamongUsII}[3][]{
  FHZamongUsPackbackII[#1]{#2};
  FHZamongUsBodyII[#1]{#2};
  FHZamongUsEyesII[#1]{#3};
}
%  =======================================

endinput

The main.tex file:

documentclass{article}
usepackage[margin=2cm,landscape]{geometry}
usepackage{FHZ-amongUs}

begin{document}
begin{tikzpicture}
  FHZamongUsPackbackI[shift={(0,0)}]{yellow};
  FHZamongUsBodyI[shift={(0,0)}]{yellow};
  FHZamongUsEyesI[shift={(0,0)}]{cyan};
  % ===========
  FHZamongUsI[shift={(5,0)}]{red}{blue};
  FHZamongUsI[shift={(10,0)}]{green}{gray};
  FHZamongUsI[shift={(15,0)}]{blue}{orange};
  % ===========
  FHZamongUsPackbackII[shift={(0,7)}]{yellow};
  FHZamongUsBodyII[shift={(0,7)}]{yellow};
  FHZamongUsEyesII[shift={(0,7)}]{cyan};
  % ===========
  FHZamongUsII[shift={(5,7)}]{red}{blue};
  FHZamongUsII[shift={(10,7)}]{green}{gray};
  FHZamongUsII[shift={(15,7)}]{blue}{orange};
end{tikzpicture}

FHZamongUsOriginal{yellow}{cyan}
FHZamongUsOriginal[angry]{yellow}{cyan}
FHZamongUsOriginal{black}{white}
FHZamongUsOriginal[angry]{gray}{white}
FHZamongUsOriginal[very angry]{white}{black}
end{document}

and the results are:

---

Update 2

Avaliable in CTAN

I updated drawings, syntax and names creating a package that is now avaliable at https://www.ctan.org/pkg/tikz-among-us.

The documentation also presents some interesting applications such as animation and page numbering.