No mortal alive can even reached Asgard, or even crossed its gatekeeper.
Lenneth casually hops into them which lead her to the roof of the ruins.
Lenneth is even unaffected by the space-time distortions when she set foot in Niflheim.
Lenneth: Then, come at me with all your might! Suddenly, Lancer spots Manaka and tries to strike her with her Noble Phantasm under the control of Odin Counter Force.
Saber charges towards her foe and unloads a couple of sword swings to which Lenneth responds with her own.
Brynhildr offers her assistance as a representative of the Scandinavian Valkyries, then suggests she be used as a tool.
The two combatants leap at each other and clash blades and push each other back.