In the break room, Priyanka finds a special type of tea that she knows is only liked by her friend Ryota. She sees two empty mugs on the table, one with traces of that special tea and another with traces of coffee. When Kiara enters the room, Priyanka asks her if she has seen who drank the tea, since Priyanka knows Kiara dislikes coffee and wouldn't have used either of the mugs. Kiara mentions that she saw Takehiko and Ryota chatting in the break room earlier, and Takehiko holding a mug, but she didn't see who drank from which mug. If we know Takehiko prefers coffee and only drinks tea when coffee is unavailable, who is likely to have drunk the tea? Provide a very brief response.
Priyanka has found traces of a special tea in one of the mugs, which she associates with Ryota's preference. Given Kiara's observation that both Takehiko and Ryota were present in the break room earlier and considering Takehiko's preference for coffee, it's reasonable to infer that Takehiko used the mug with coffee traces. Since Ryota enjoys this special tea and he was present in a situation where one of the empty mugs has traces of that tea, it is likely that Ryota consumed the special tea. Kiara's aversion to coffee confirms she didn't drink from the mugs, and Takehiko would only opt for tea if no coffee were available. Since a mug with coffee residues is present, this indicates that Takehiko had his preferred beverage available and thus wouldn't have chosen the tea, leaving Ryota as the one who likely drank the tea.