The drawing technology used to draw characters was based on Takeo Igarashi's "Teddy" software.

Entity and relation annotations:
id: 0
type: entity
value: text: Takeo Igarashi
labels: <Person>
id: 1
type: entity
value: text: "Teddy" software
labels: <Production>
type: relation
to_id: 1
labels: Person:creates:Production
from_id: 0