~Dark; Erm.. O.o sorry but Kanako doesn't have Arrow rain. Maybe you are confused with the one from 15 Round or because her RB skill is called "Falling Arrows"
If you want a pet that attacks more than 4 then there is Niss (6), Fred (4, 3 in back 1 in front) and RB Clive (3 in back 1 in front) rest of the pets only does 1 or 2 in a row. Elin also does 3 in a collum
Picklessssssssssssssssssssss!~
See more on Know Your Meme
[Guide] Level Planner for Player and Pet Training - http://wlodb.com/topics/13527
[Guide] Ultimate Pet Page - http://wlodb.com/topics/15272