Certainly! Let's match each trait with the character it best describes:
### Step-by-Step Solution:
1. Disappointed: The character best described by the trait "disappointed" is Gerhardt.
2. Excitable: The character best described by the trait "excitable" is Neville.
3. Flexible: The character best described by the trait "flexible" is Nadezhda.
4. Realistic: The character best described by the trait "realistic" is Gerhardt.
### Final Matching:
\begin{tabular}{|l|c|}
\hline \multicolumn{1}{|c|}{ Trait } & Character \\
\hline disappointed & Gerhardt \\
\hline excitable & Neville \\
\hline flexible & Nadezhda \\
\hline realistic & Gerhardt \\
\hline
\end{tabular}
So, we have completed the matching of traits to characters as required.