I find this topic interesting, considering that most of the female figureheads of Animorphs were secondary characters. You have Edriss (who, despite being Yeerk, clearly identified as female), the mayor/governer, the brief passing mention of the president in #54, etc. However, the main roles of power throughout the series were, in fact, held by males. Let's look at the list:
Alloran: Before he was disgraced he was a well-known and powerful military commander.
Esplin 9466: Identifies as male, is a powerful leader in the Yeerk Empire.
Elfangor: One of the most trusted leaders and heroes of the Andalite military (which is almost exclusively male)
Jake: (Rather successful) Leader of the Animorphs.
James: Leader of the Auxiliaries.
....and really, that's just the tip of the ice berg. There were MANY male leadership roles throughout Animorphs, and it's actually a bit unnerving to see that as soon as a female is placed in a similar role, even as a background character, it automatically turns into a feminist statement.