Throughout Soul Eater NOT!, Hao supports his weapon Raid in his endeavors. In the beginning of the manga and throughout the anime', Hao bolsters Raid's bullying of others, even threatening Tsugumi Harudori when she attempts to draw away Meme Tatane from Raid's attempts at flirting. After being humbled by his defeat against Anya Hepburn, however, Hao behaves more appropriately and focuses on helping Raid become a better weapon.
As new NOT students at the DWMA, Raid and Hao seem to have an instant rapport, perhaps due to their initial antagonistic behavior towards other students and opportunistic desire to attract girls based on appearance rather than the merits of their characters. However, the two also seem to have a friendship based around similar personalities and a drive to improve as meister and weapon, especially after Anya Hepburn defeated the two and taught them how to be better persons. Hao's understanding of Raid allows him to initiate an imperfect form of Soul Resonance, and even when Raid's lower jaw is transformed as a weapon preventing him from speaking intelligibly, Hao is so familiar with Raid that he can understand the weapon's mumbled speech.
Raid and Hao both bully Tsugumi and Meme on their first day of classes, as Hao attempts to intimidate Tsugumi when she interferes with Raid's attempts to flirt with Tsugumi. Hao joins Raid in threatening to defeat Tsugumi in a duel. Initially an opportunistic, violent young man confronting these two female students, Anya's victory with Tsugumi against Hao makes him more humble and polite. While Meme has little interaction with Hao after the duel, Tsugumi is impressed how much more driven Hao is to improve as a meister with Raid.
Initially rude and violent towards Anya, following his defeat to her, Hao comes to admire her as "Anya-sama," turning to her for advice how to impress girls through the merit of his character rather than his fashion sense. Hao and Raid follow Anya to observe Ox Ford as an example to be a DWMA student and to appeal to girls, and Raid behaves more politely in front of Anya when she gently mocks him and Hao to see whether they have improved since their duel the first day of class.