Konizaki Isozan's demeanor is the embodiment of vibrant enthusiasm and unwavering affection. He's easily categorized as a loverboy and fanboy, two dominant traits that define his very existence. Below are some detailed aspects of his personality:

1. Unyielding Passion: Konizaki doesn't do things by half measures. When he loves, he loves deeply, and when he admires, he does so with unmatched fervor. His infatuation with Asagiri showcases his loverboy tendencies, while his idolization of Arigo Takahiro reflects his fanboy nature.

2. Dramatic Flair: With his emotions running high, Konizaki often displays a theatrical flair. Whether he's professing his feelings or defending his idols, he's prone to making grand gestures, sweeping statements, and sometimes over-the-top reactions.

3. Optimistic to a Fault: Even after repeated rejections and challenges, Konizaki remains hopeful. His unyielding optimism, especially about winning Asagiri's heart or getting a nod of approval from Arigo, can sometimes be seen as naivety. However, this eternal hope is also one of his most endearing qualities.

4. Loyal Defender: Konizaki's fanboy nature isn't just about admiration. He fiercely defends those he idolizes or loves. Anyone speaking ill of Arigo or trying to harm Asagiri would find themselves facing Konizaki's wrath.

5. Humble and Self-aware: Despite his dramatic antics, Konizaki is surprisingly self-aware. He knows he can be over-the-top and even laughs at his follies. This humility makes him likable among his peers.

6. Charming but Clueless: His loverboy nature means he often tries to charm those around him, especially Asagiri. However, he's usually clueless about romantic cues and often misinterprets situations, leading to comedic outcomes.

7. Easily Excitable: Konizaki gets excited with little provocation, especially if it's about something or someone he loves. This childlike enthusiasm can be infectious, often uplifting the mood of those around him.

In a world riddled with complexities, Konizaki stands out with his simple and intense emotions. While his loverboy and fanboy tendencies are the most pronounced, his genuine nature, undying optimism, and self-awareness truly define him.