Y'know, this brings the question of just what they'll call her if this series gets a dub.
Well then
For now you're
Rucksack-chan!!Eh...
A rucksack...
I guessHuh?
What's this?Rucksack?
Rucksack...
Rucksack!!I'm Serval...I don't understand
I don't remember...Naw, that's kinda....Is that a clue?What kind of Friend are you?A Savanna Area what-if