Kirin-chan

Kirin-chan is a Dwarf Summoner-Animal Trainer in the Black Sword Knights. Her birthday is on May 15.

Even though she looks like a joke with her giraffe-head headdress, she's actually a highly skilled combatant and entertainer who utilizes high-speed comedy action. Her favorite phrase is "Giraffes can run at 60km per hour?!" Anyone who points out her short stature will be met with a sharp headbutt from her giraffe head.

Round Table arc
When Isaac is invited to the Round Table Conference, Kirin-chan is seen among the members in the background, watching him and Rezarick converse.

After the Log Horizon members move into their new guild house only to find it completely dirty, Isaac barges in with some of his Summoners, Kirin-chan among them. He then has them use their Undines to flood the entire building, completely cleaning it in the process before leaving as quickly as they had come.

Nightingale's Song arc
Kirin-chan is one of the Black Swords present in Akiba when the Genius Eirenus invades, thus getting sucked into the dungeon it creates along with Isaac, Rezarick, and Kinou no Wanko. They are the first to come across the Genius at Akiba Station, where their levels are forcibly reduced to 35 by its abuse of the Teacher System.

While it is not shown what becomes of her, she is presumably killed by the level 65 Genius shortly after it kills Isaac.