她是故事的叙述者，可以被认为是第二主角。

She acts as the narrator of the story and can be considered a deuteragonist.

youdao

他老婆演主角，而我可以演第二主角。

His wife was playing lead, but I could play seconds.

youdao

剧组工作人员常从肥皂剧中找演员，那些演员的未来常是不确定的——常在试播节目中做第二主角，希望着节目不会被撤播。

Networks often cast actors from bubble shows -- those whose future is iffy -- on pilots in second position, betting that those series won't return.

youdao