Feh is an owl in Fire Emblem Heroes and a messenger for the Order of Heroes.

Feh takes residence in the player's Castle on a special perch. Normally, Feh is asleep, but will awaken whenever the player receives an in-game gift.

Feh also runs a special YouTube series called Feh Channel, where she helps to announce upcoming events in Heroes.

(Source: Fire Emblem Wikia)

A collection of comedic 4-panel comics by various mangaka about the daily lives of the characters of Fire Emblem Heroes. 
 
Fire Emblem Heroes: Eiyuu-tachi no Nichijou is published on the official Fire Emblem Heroes website, and published in print by Ichijinsha. The series has been published digitally in English as Fire Emblem Heroes: A Day in the Life since October 23, 2019. 
 
Note: Includes 22 volume-exclusive chapters.