Identify the odd one out in each of the following lists and explain your reasoning.

Here are the odd ones out for each list:

1. The characters are: husband, wife, children

   • Husband and wife are singular terms, referring to individual adult roles. "Children" is a plural term, referring to multiple offspring.
   • The odd one out is $\boxed{\text{children}}$.

2. Who entered the house?: guest, robber, Kotwal

   • A guest enters by invitation for a social visit. A robber enters illegally with criminal intent. A Kotwal (a historical police chief or town administrator) enters in an official capacity, representing authority. The Kotwal's entry is distinct from a social visit or a criminal act.
   • The odd one out is $\boxed{\text{Kotwal}}$.