Necklaces is probably safest. Sensei can keep hers under her buttoned up collars and turtlenecks. Straps or bracelets would be too noticeable. Ankle bracelets, maybe... but since Hikari is always wearing a skirt and Sensei probably wears one frequently, that might be noticed as well.
Necklaces is probably safest. Sensei can keep hers under her buttoned up collars and turtlenecks. Straps or bracelets would be too noticeable. Ankle bracelets, maybe... but since Hikari is always wearing a skirt and Sensei probably wears one frequently, that might be noticed as well.