By the way, is this Charisma Mode canon? I've never heard of it before, but it does seem to explain how freaked out a lot of the beanpaste's get sometimes.
Yukkuri's ability: 'Charisma Mode'
Yukkuri Remilia holds the ability to effect how other yukkuri's perceive it based on it's 'Charisma'.
This 'Charisma' allows Remilia's to amplify how fearful they are in other yukkuri's eyes; if they yukkuri holds no fears about the Remillia in question, then they will see it normally, but if they have even just a bit of fear of it, that terror will be amplfied until they see Remillia's figure as if it is as awesome as a demon from hell.
So they other yukkuri's see Remillia as a bloodsucking monster, due to the dormant sense of fear of of the yukkuri Remillia type stored deep within their ancestral beanpaste. Because of this ancestral sense, yukkuri's will often be afraid of Remillia's regardless of whether they are using 'Charisma Mode' or not.
Flan and Sakuya types are immune to Remillia's charisma from birth, but other yukkuri's must be taught not to fear if they are to be able to be around a friendly Remillia normally.
The Image on the right is an illustration of what the family see's when they look at Remillia.Mother's visionChildren's vision