Answer:
The quality or state of being excessively sensitive or emotionally idealist is called Sentimentality.
Step-by-step explanation:
The term sentimentality is defined by the Mariam Webster dictionary as "the quality or state of being sentimental especially to excess or in affectation". Thus, it simply means the state of someone being extra affectionate or excessiveness in their emotions.
Literary works of art uses this sentimentality to induce a soft or tender emotion in a character in a particular situation. Some writers even tend to include stronger emotions in their characters.