Fire Emblem is a tactical RPG which takes place in multiple medieval fantasy settings. Most of the games feature different characters and locations but all still exist in the same multiverse.
Power of the Verse
Overall Fire Emblem is not very powerful as many of its characters lack large destructive feats. That being said the games do have several massive final bosses which are capable of large scale magic attacks.
There are many large dragons in the games which have been shown destroying large castle towers and the strongest spells usually have at least room to building sized area of effect so most characters should be around building level. Several characters were shown to destroy pillars of solid ice with ease, thus are scaled to large building level. (Some characters have certain feats and weapons that put them on tier 6.)
A typical Fire Emblem character should have hypersonic speed as many of them can dodge arrows, lightning attacks and meteors on a regular basis. Also the sword master attack animations in some games show them moving faster than the eye can see.
Supporters and Opponents of the Series
Flames of power64
VircaTheDestroyer (loves the series but some of these feats are outliers and have no real weight)
Fire Emblem Shadow Dragon and Mystery of the Emblem
Fire Emblem Gaiden / Fire Emblem Echoes: Shadows of Valentia
Fire Emblem Mystery of the Emblem / New Mystery of the Emblem
Fire Emblem: Geneaology of the Holy War
Fire Emblem Thracia 776
Fire Emblem: Binding Blade
Fire Emblem: Blazing Sword
Fire Emblem: Sacred Stones
Fire Emblem Path of Radiance
Fire Emblem Radiant Dawn
Fire Emblem Awakening:
Fire Emblem Fates:
Tokyo Mirage Sessions #FE:
Fire Emblem Heroes
Sword of Seals
Meteor Dodging (Applies to all of FE except for 6, 7, and 8)