Galaxy Angel Z - EP02a

From Galaxy Angel.

Summary (with spoilers)
During a mission, Milfeulle takes a detour to help an old man deliver a tsuchinoko kigurumi for a festival. Mint, displaced from her seat by the traveler, finds the box in the cargo bay containing the costume and helps herself. When she finds she can't get it off and is left alone on the destination planet by Milfeulle, she is mistaken for a real life tsuchinoko by the locals.

For a few seconds, Mint is shown as a giant monster during an advertisement.

Source

 * https://es.wikipedia.org/wiki/Galaxy_Angel
 * https://en.wikipedia.org/wiki/List_of_Galaxy_Angel_episodes