Kon has two theme songs. First is Kuuki Koudan's "Tanaka-San, Nichiyo Dance" and RIP SLYME's "Bushman", which is only 46 seconds long. Both of them are fine, but nothing I'd listen to agian.
Ishida's introduction, my brother's favourite character but I don't recall thinking much of him when I watched Bleach. Looking forward to seeing if my perspective on him changes going through the manga, I like that his introduction is a bit more built up (stuff like him being the top scorer is neat too), and him being a Quincy action guy who disposes of Hollow's incredibly quickly makes him stand out opposed to the other characters introduced thus far.