User blog comment:Just a passing through Master/Anastasia Nikolaevna Romanova (Summer)/@comment-27971189-20190901130421/@comment-32751919-20190903133510

Perhaps so, she would be tagalong with the King team, just like bring Eli with all Female team. (at least until more support servant was add, poor Eli)

Cuz she is into her Kotatsu and use it as a weapon as well. Yep, Kotatsu mean to be giving human a heat to get warmer, but as it's a summer, so...maybe Anastasia is too cold.