[quote=@Demous]
<Snipped quote by Burthstone>

Uh... Burth? Legions are huge. erza and erza were able to fight on the back of one...
[/quote]

I know how large a Legion is, this form is large, which is why she has no problem with people riding her.

Still a good bit smaller than an actual dragon if I understand it correctly though.

[quote=@Demon Shinobi]
<Snipped quote by Burthstone>

hmmmm 
White Legion? Or Dark Legion? 
Essentially, I think my bro Zro could one hand it having been used to extreme training with Hemlock and having had to move him around often. But I can edit it out. Or you could make Mithera get a little smaller upon being lifted. Regardless, we can work this out.
[/quote]

There is the level of unwieldiness of a creature that size as well, and it suggest that she lets him pick her up anyway. She is on guard for another attack after all.

Edit: Also, between the two.