I was wondering how people were gonna react to Grandpa now being around anymore. Ig now Chino's gonna be a real ventriloquist huh. I hope we see how the real Tippy reacts with the other bunnies.
It seems like all the characters noticed something was "off" with Chino and Tippy in chapter 146 - Maya and Megu were the first to comment, Fuyu just after, Cocoa realizes that Chino is sad and actually plays the onee-chan bit straight during the fireworks display and holds Chino's hand (Chino even remarks on how mature Cocoa is behaving for her later in the chapter), Aoyama notices the death symbolism in Chino's choice of Yukata pretty much instantly when she sees a photo of Chino during the festival, Syaro and Chiya remark on Tippy's "new" (rabbit) voice definitely not being ventriloquism, Cocoa introduces herself to Tippy as if meeting her for the first time, and so on. Rize certainly noticed the "ventriloquism slump" too, and really went out of her way to try to help!
It seems that a lot went unsaid between the end of Chapter 145 and beginning of 146, with Chino realizing what happened and trying to adjust. It's really a sign of the growth of all the characters, I think, in how quickly they noticed something must have happened, and tried in their own ways to cheer Chino up.
Speaking of which, we've really seen a lot of growth for these characters, which I think is part of the point behind the conclusion of Grandpa's part in the story: he was there as "Tippy" to help watch over Chino, but Chino taking the bold step to visit Cocoa's family without prompting was a big turning point in her story, and we certainly see Chino smiling and laughing with her friends often by that point, as a sign that she'd "bloomed" and could stand on her own now. The alteration in her childhood dream of being Grandpa, to following in his footsteps but adding something of her own into the blend, was the final sign that Grandpa had done his part, and no longer needed to be there to watch over her.
I enjoyed the story so far on my first reading, but during the second, I was really impressed with the storytelling involved - I don't think I quite gave it enough credit the first time around for being more than just "cute girls doing cute things". There's a lot more foreshadowing, character development, symbolism, callbacks to earlier sequences for comparison/contrast, and so on, and I can see now where plot points that don't pay off until dozens of chapters later are set up far earlier than I realized. The grandpa story arc really feels satisfying, bittersweet but heartwarming and touching, feeling like it came in at just the right time and place in the story.
The comic relief hypnotism chapter might have been in danger of feeling a bit out of place, since it breaks up the developments for Chino in the Chapter 146 fireworks story, and the ventrioloquism story in 148 where we see Chino moving on in her own way while Rize and Cocoa do their best to help, but the hypnotism chapter's comic relief does help lighten the mood from the heavier material, and is interesting in its own way for the way it touches on Rize, Chiya, and Syaro's character development....
By this point, those original characters have more or less completed their character development, with Maya and Megu pretty close behind, which is why we're seeing more of an emphasis on how these characters affect the "Bright Bunny Group" of new characters, whose character arcs are moving along at a much more brisk pace compared to the original five characters!